Tunnel Name Generator
Rail bores, road tunnels, underways and transit tubes
Generate tunnel names for maps, stories and city builders: railway bores, road and canal tunnels, harbor crossings, sewers, smugglers' runs and dwarven underways, such as Blackrock Tunnel, Summit Bore, Smugglers' Run and The Underway.
About Tunnel names
Real tunnels are usually named for what lies on top of them. Most take the hill, pass, river or strait they run under, which is how the Channel Tunnel, the Severn Tunnel and the Simplon Tunnel got their names. A smaller group honors a person: the Holland Tunnel carries the name of its chief engineer and the Eisenhower Tunnel that of a president. Railways often simply number the tunnels along a line, and locals add a nickname of their own.
The form-word does a lot of work. A bore is one tube of a tunnel, so a twin-tube crossing can have an Up Line Bore or a Southbound Bore. A base tunnel runs through the foot of a mountain instead of climbing toward the summit, a gallery is an open-sided cover against avalanches and rockfall, and an underpass, called a subway in British usage, is a short crossing beneath a road. Many old canal tunnels had no towpath, so crews pushed against the walls with their feet, which was called legging and gives Leggers' Tunnel its name.
The list mixes those habits with fiction: rail, road and canal tunnels, alpine galleries, harbor crossings, memorials to invented people, city subways and sewers, smugglers' runs, dwarven underways, dungeon passages, transit tubes, lunar lava tubes and local nicknames.
How to choose Tunnel names
- Start with what the tunnel passes under. A hill, pass, river or street plus Tunnel reads like a real map, as in Ashby Hill Tunnel or Fourth Street Tunnel.
- Pick the form-word for the scale: Underpass or Subway for a short crossing, Bore or Base Tunnel for a long mountain drive, Gallery for an avalanche shelter, Tube for an underwater or science-fiction line.
- Give a long or dangerous tunnel a nickname beside its official name. Crews and locals would say The Long Dark or Hell's Half Mile, not the name on the plaque.
- For fantasy, name the route for who built it or what moves along it: Kazgrim's Deepway, The Ore Cart Road, Smugglers' Run.
- A place word plus Tunnel can match a real tunnel somewhere. If that matters for your project, search the name yourself before you settle on it.
Frequently asked questions
How are real tunnels named?
Most take the name of the mountain, pass, river or strait they pass under, or of the town at one portal. Others honor an engineer, a politician or a saint, and railways often number them along the line. The list follows the same habits with names such as Coldwater Tunnel, Elias Varnham Tunnel and Tunnel No. 4.
Are any of these real tunnels?
Yes, a small share, included as style anchors: Channel Tunnel, Gotthard Base Tunnel, Simplon Tunnel, Mont Blanc Tunnel, Seikan Tunnel, Lærdal Tunnel, Holland Tunnel, Lincoln Tunnel, Thames Tunnel, Box Tunnel, Severn Tunnel, Standedge Tunnel, Hoosac Tunnel, Moffat Tunnel, Cascade Tunnel, Eisenhower Tunnel, Arlberg Tunnel, Blackwall Tunnel, Rotherhithe Tunnel, Harecastle Tunnel, Blisworth Tunnel, Wawona Tunnel, Otira Tunnel and Fréjus Tunnel. The rest are invented, and the memorial names use invented people. A place word plus Tunnel is a common pattern, though, so an invented name can still match a real tunnel somewhere.
What makes a good fantasy or sci-fi tunnel name?
Name the passage for its builders, its cargo or its danger. The Anvil Road and Thrundar's Underway sound like dwarven trade routes, and The Weeping Corridor warns a dungeon party before it sets foot inside. Transit Tube Seven or Mare Serenum Lava Tube suits a colony map, where routes are numbered or tied to a landform.
Can I use these tunnel names in a game, book or map?
Yes. Use them freely in fiction, tabletop campaigns, city builders and model railway layouts. For a real-world project, search the name yourself first, because some of these patterns are common on real maps.
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All 1,000 Tunnel names
A: 24 names
- Abbot's Way Under
- Access Drift Three
- Adamant Gate Road
- Admiral Thorne Tunnel
- Alderman Fitch Subway
- Alpenglow Tunnel
- Anchor Reach Tube
- Anselm Krüger Tunnel
- Antispinward Run
- Anvilgate Tunnel
- Apogee Tunnel
- Aqueduct End Tunnel
- Aqueduct Tunnel Two
- Arcade Line Tunnel
- Arcology Underlink
- Arlberg Tunnel
- Armistice Tunnel
- Arvenjoch Tunnel
- Ash Pit Tunnel
- Ashby Hill Tunnel
- Ashcombe Canal Tunnel
- Asteroid Core Shaft
- Atrium Link
- Avalanche Gallery
B: 52 names
- Backwater Culvert
- Bakers' Row Underpass
- Bank Corner Subway
- Banshee Bore
- Barge Horse Underpass
- Bargeman's Tunnel
- Barrel Way
- Barrelmakers' Road
- Barrow Lane Underpass
- Basilisk Run
- Basin End Tunnel
- Basin Rim Conduit
- Bay of Embers Lava Tube
- Bayshore Tunnel
- Beacon Fell Tunnel
- Bedrock Express
- Beetle Burrow Road
- Bell Buoy Crossing
- Bellevue Tunnel
- Bellows Way
- Bellweather Tunnel
- Beltway Tunnel
- Bergfried Tunnel
- Bicentennial Tunnel
- Bight Crossing
- Bishop Wendell Tunnel
B, continued
- Bitterroot Bore
- Black Lugger Tunnel
- Blackrock Tunnel
- Blackwall Tunnel
- Blast Door Corridor
- Blind Man's Mile
- Blisworth Tunnel
- Bluff Street Tunnel
- Boiler House Service Tunnel
- Boiler House Tunnel
- Box Tunnel
- Brakeman's Tunnel
- Breakwater Tunnel
- Brewery Cellars Tunnel
- Brewhouse Siphon Tunnel
- Brickfield Tunnel
- Brickwork Main
- Brigadier Ainsley Tunnel
- Brindle Hill Tunnel
- Brokk's Long Stair
- Bronzehall Underway
- Bulkhead Corridor Four
- Bullring Subway
- Bulrush Tunnel
- Butter Cross Underpass
- Butty Tunnel
C: 86 names
- Cable Vault Run
- Caisson Tunnel
- Calcott Summit Tunnel
- Callisto Trench Link
- Campus Steam Tunnels
- Canal Street Pedway
- Canyon Road Tunnel
- Capitol Hill Tunnel
- Captain Voss Tunnel
- Cargo Tube Delta
- Cascade Divide Bore
- Cascade Tunnel
- Castle Rock Tunnel
- Castle Well Passage
- Catchwater Tunnel
- Cathedral Close Subway
- Cathedral Hill Tunnel
- Cattle Market Subway
- Cellar-to-Cove Passage
- Centennial Tunnel
- Ceres Spoke Tunnel
- Chamois Gallery
- Channel Tunnel
- Chapel Cellar Passage
- Chapel Hill Underpass
- Chief Engineer Okafor Tunnel
- Chilled Water Loop
- Cinder Cone Bore
C, continued
- Cinder Hill Bore
- Cinder Imp's Flue
- Circle Line Cut
- Cistern Feed Tunnel
- Citadel Hill Tunnel
- Clan Road of Orrimhold
- Cliff Stair Passage
- Cliffside Tunnel
- Clinker Tunnel
- Clocktower Concourse
- Cloudrest Tunnel
- Coach Station Underpass
- Coal Arm Tunnel
- Coal Chute Tunnel
- Coast Road Tunnel
- Cobweb Walk
- Col de la Brume Tunnel
- Col du Lys Tunnel
- Col Rosso Tunnel
- Cold Current Tube
- Coldwater Tunnel
- Collapse Pit Gateway
- Colliers' Tunnel
- Colonel Pruitt Tunnel
- Colony Trunk Line
- Combined Trunk Sewer
- Commissioner Dufresne Tunnel
- Commodore Baines Tube
- Commuter Bore West
C, continued
- Constitution Tunnel
- Contraband Crawl
- Coolant Run Six
- Cooling Water Tunnel
- Copper Notch Tunnel
- Coppervein Delveway
- Cormorant Rock Tunnel
- Corn Exchange Concourse
- Cornice Tunnel
- Cornmarket Underpass
- Coronation Underpass
- Corridor of Cold Lamps
- Corridor of Last Light
- Corridor of Rusted Blades
- Corridor of Whispers
- Courthouse Underpass
- Cowley Cutting Tunnel
- Cragfoot Underway
- Crater Floor Link
- Cress Brook Tunnel
- Crestline Bore
- Crooked Tunnel
- Cross-Platform Foot Subway
- Cross-Platform Passage
- Crosstown Tunnel
- Crown Wharf Tunnel
- Customs House Subway
- Customs Wharf Tube
- Cutbank Tunnel
D: 34 names
- Dame Rosalind Achebe Tunnel
- Dark Mile Tunnel
- Dawn Wall Gallery
- Dead Man's Curve Tunnel
- Deadwood Grade Tunnel
- Deep Core Shuttle Bore
- Deep Line Omega
- Deep Shelter Cross-Passage
- Deep Storage Tunnel
- Deepgate Delve
- Deepwater Link
- Delta Crossing Tunnel
- Depot Spur Dive-Under
- Devil's Elbow Tunnel
- Disused Platform Passage
- Diversion Tunnel One
- Dockside Link
- Dome Six Lava Link
- Dome-to-Dome Connector
- Downwell Passage
- Dr. Imelda Roche Tunnel
- Dr. Yusuf Karimi Tunnel
- Draw-Off Tunnel
- Dreitannen Tunnel
- Dripping Arch Tunnel
- Drowned Valley Tunnel
- Dry Lake Bed Tube
- Drydock Tunnel
- Drypool Tunnel
- Duke Rainald Tunnel
- Dunmore Tunnel
- Durgan's Cut
- Dustfree Corridor
- Dye Works Culvert
E: 27 names
- Earthrise Tunnel
- East Portal Bore
- Eastern Trunk Main
- Eastgate Underpass
- Ebb Tide Tube
- Echo Alley
- Echo Subway
- Edelgrat Tunnel
- Egg Sewer
- Eisenhower Tunnel
- Eisenjoch Tunnel
- Elder Lock Tunnel
- Elephant Walk Subway
- Elias Varnham Tunnel
- Elkhorn Summit Tunnel
- Elm Grove Underpass
- Embankment Subway
- Emberhall Deepway
- Emergency Egress Tube
- Emperor's Tunnel
- Enceladus Stripe Tunnel
- Engineer Brandt Bore
- Estuary Tube
- Europa Meltway
- Exchange Subway
- Excisemen's Dread Passage
- Express Track Bore
F: 35 names
- Fairgrounds Underpass
- Fairway Channel Tunnel
- Fallen Firefighters Tunnel
- Farside Conduit
- Feeder Tunnel
- Felsentor Tunnel
- Fennimore Tunnel
- Fenny Hill Tunnel
- Ferryman's Rest Tunnel
- Ferrymen's Row Subway
- Firebeard's Bore
- Fireman's Rest Tunnel
- Firth Crossing
- Fishmarket Subway
- Fjord Floor Tunnel
- Flint Ridge Bore
- Flood Relief Culvert
- Flower Market Underpass
- Flyboat Tunnel
- Foghorn Tunnel
- Fonte Fredda Gallery
- Foothills Tunnel
- Founders Tunnel
- Foundry Row Conduit
- Fourth Street Tunnel
- Fox-Earth Passage
- Foxhollow Canal Tunnel
- Freetraders' Way
- Freight Conduit Kappa
- Fréjus Tunnel
- Friendship Tunnel
- Frostforge Underway
- Frostgrat Tunnel
- Frozen Flow Gallery
- Fungal Corridor
G: 36 names
- Galleria Underpass
- Gallows Crawl
- Gamsgrat Avalanche Gallery
- Ganger's Tunnel
- Ganymede Furrow Tunnel
- Garnet Vein Underway
- Gasworks Conduit
- Gauging Lock Tunnel
- Gemcutters' Passage
- Ghost Station Link
- Ghost Train Tunnel
- Ghoul Run
- Glacier Gate Tunnel
- Glassworks Arcade Subway
- Gloomgate Passage
- Glovers' Quarter Sewer
- Glowworm Gallery
- Golden Jubilee Subway
- Goldgrubber's Road
- Gotthard Base Tunnel
- Governor Halloway Tunnel
- Grand Avenue Tunnel
- Granite Notch Tunnel
- Granitehold Tunnel
- Granville Road Tunnel
- Grauhorn Tunnel
- Gravel Spit Crossing
- Great Divide Base Tunnel
- Greatforge Delveway
- Greenbelt Tunnel
- Greenhouse Row Corridor
- Greenwell Canal Tunnel
- Greyfriars Underpass
- Greywacke Tunnel
- Guildhall Subway
- Gull Island Crossing
H: 54 names
- Hab Ring Passage
- Habitat Link C
- Hairpin Gallery
- Half Mile Tunnel
- Halfway Tunnel
- Hall of Dripping Stone
- Hall-to-Hall Way
- Hallowmere Terrace Underpass
- Hanging Valley Tunnel
- Hangman's Hole
- Harbor Crossing Tunnel
- Harbormaster's Tunnel
- Harecastle Tunnel
- Harrowgate Tunnel
- Hartwell Memorial Tunnel
- Hawksworth Tunnel
- Hawthorn Flight Tunnel
- Haymarket Subway
- Headache Tunnel
- Headland Tunnel
- Headlands Link
- Headrace Bore
- Hearthdeep Underway
- Heating Plant Corridor
- Helium Works Haulway
- Hell's Half Mile
- Heron Reach Tunnel
H, continued
- High Line Tunnel
- High Tarn Tunnel
- Highland Bore
- Hillcrest Tunnel
- Hochalm Gallery
- Hochjoch Base Tunnel
- Hohe Scharte Tunnel
- Hold-Your-Breath Tunnel
- Holdfast Underway
- Holland Tunnel
- Hollin Edge Tunnel
- Hollow Moon Road
- Hollow Road Underpass
- Hollow Wall Way
- Hollowhelm Passage
- Hollybush Tunnel
- Hook Point Tunnel
- Hoosac Tunnel
- Horatio Benbow Tunnel
- Horse Path Tunnel
- Horseshoe Curve Tunnel
- Hospice Tunnel
- Hospital Link Corridor
- Hotel Row Pedway
- Hut Nine Tunnel
- Hydroponics Access Way
- Hydroponics Corridor Zeta
I: 13 names
- Ibex Horn Tunnel
- Ice House Passage
- Ice Shell Bore
- Icefield Bore
- Independence Tunnel
- Inlet Tube
- Inner Loop Tunnel
- Innkeeper's Secret Stair
- Interchange Underpass
- Io Sulfur Way
- Iron Mountain Bore
- Ironbeard Underway
- Island Link Tunnel
J: 3 names
- Josiah Pell Tunnel
- Jubilee Tunnel
- Juniper Summit Tunnel
K: 13 names
- Kaltenbach Tunnel
- Kazgrim's Deepway
- Keelman's Tunnel
- Keg Roll Tunnel
- Kelp Bay Tube
- Kettle Falls Tunnel
- Kingfisher Tunnel
- Kingsdelve Tunnel
- Kingsgate Underpass
- Kiosk Row Subway
- Kirchberg Base Tunnel
- Kobold Crawl
- Kronberg Summit Tunnel
L: 40 names
- Lace Runners' Tunnel
- Lagoon Crossing Tunnel
- Lakeshore Tunnel
- Lamp Row Passage
- Lampblack Brook Sewer
- Lamplighters Memorial Underpass
- Lantern Boat Tunnel
- Larch Gallery
- Lærdal Tunnel
- Larkspur Tunnel
- Laurel Gap Tunnel
- Lava Tube Habitat One
- Leggers' Tunnel
- Liberation Tunnel
- Library Steps Underpass
- Lichgate Passage
- Lifeboat Crews Memorial Crossing
- Lighthouse Keeper's Passage
- Lighthouse Narrows Tunnel
- Lime Kiln Tunnel
- Lincoln Tunnel
- Line Seven Connector
- Long Pound Tunnel
- Long Ridge Bore
- Longshore Crossing
- Longsight Bore
- Longwater Tunnel
- Lookout's Tunnel
- Loop Line Tunnel
- Lord Penhallow Tunnel
- Lost Brook Culvert
- Lovers' Tunnel
- Low Gravity Mile
- Low Headroom Tunnel
- Low Level Interceptor
- Low Street Tram Tunnel
- Low Tide Crossing
- Lower Concourse Pedway
- Lower Decks Transitway
- Lunar South Link
M: 46 names
- Maglev Conduit Alpha
- Magma Vein Passage
- Maintenance Way Four
- Mantle Bore Station Link
- Mare Serenum Lava Tube
- Maria Loop
- Marina Tube
- Mariner Deep Underway
- Market Street Underpass
- Marlbank Tunnel
- Marmot Gallery
- Marrow Ridge Tunnel
- Marsh Lane Sewer
- Marshal Dravik Tunnel
- Mayor Ostrander Tunnel
- Merchant Seamen Memorial Tunnel
- Metro Line Zero
- Mezzanine Link
- Midchannel Tunnel
- Midtown Cut-and-Cover
- Mile Post Forty Tunnel
- Mill Brook Drain
- Mill Race Tunnel
M, continued
- Mill Stream Culvert
- Millennium Tunnel
- Mimic's Throat
- Miners Memorial Tunnel
- Mining Ring Shuttleway
- Minnowbeck Relief Sewer
- Moaning Tunnel
- Moffat Tunnel
- Moldering Way
- Mont Blanc Tunnel
- Monte Cervo Tunnel
- Monte Lupo Gallery
- Monument Avenue Tunnel
- Moonrakers' Stair
- Moonrakers' Tunnel
- Mooring Tunnel
- Moraine Gallery
- Mossgrown Bore
- Mother Agnes Tunnel
- Motorway Link Tunnel
- Mudflats Tube
- Mulberry Street Tunnel
- Museum Walk Underpass
N: 13 names
- Narrowboat Tunnel
- Narrows Crossing
- Navigation Tunnel
- Navvies Memorial Tunnel
- Navvies' Tunnel
- Necromancer's Back Stair
- Night Line Tunnel
- Nightside Haulway
- Nordwand Gallery
- Northern Strait Tunnel
- Northside Connector
- Number Nine Bore
- Number Three Escape Shaft
O: 30 names
- Oathkeeper's Underway
- Old Channel Tube
- Old Cut Tunnel
- Old Evacuation Tube
- Old Ferry Tunnel
- Old Flow Channel
- Old Grade Tunnel
- Old Leaky
- Old Mint Passage
- Old Navigation Bore
- Old River Conduit
- Old Rumbler
- Old Smoky
- Old Soldiers Tunnel
- Old Ticket Hall Passage
- Old Town Bypass Tunnel
- Old Town Main Drain
- Old Tramway Portal
- Old Turnpike Tunnel
- Olympus Flank Bore
- Opera House Concourse
- Orbital Tether Shaft
- Orchard Road Underpass
- Otira Tunnel
- Outer Harbor Tunnel
- Outpost Connector Two
- Overflow Chamber Way
- Overlook Tunnel
- Owlers' Passage
- Oyster Bank Crossing
P: 39 names
- Packet Boat Tunnel
- Paper Mill Culvert
- Parkway Tunnel
- Parliament Pedway
- Passage of Echoes
- Passage of Seven Doors
- Passage of Teeth
- Passage of the Blind Watcher
- Passage of the Last Torch
- Passage of the Sleeping King
- Passo Bianco Tunnel
- Passo dei Venti Gallery
- Peace Tunnel
- Peak of Light Tunnel
- Pedway North
- Pelican Point Tube
- Penstock Tunnel
- Permafrost Gallery
- Phobos Groove Tunnel
- Pic Blanc Tunnel
- Pilot's Reach Tunnel
- Pine Barrens Tunnel
- Pinnacle Ridge Tunnel
- Pioneer Road Tunnel
- Pipe Gallery East
- Plant Room Crawlway
- Pneumatic Dispatch Line
- Pod Track Nine
- Polar Link
- Postal Tube Line
- Postern Tunnel
- Pottery Arm Tunnel
- Priest Hole Passage
- Princess Elowen Tunnel
- Promenade Subway
- Prudence Hale Tunnel
- Puddlebank Tunnel
- Pump House Conduit
- Pump Station Adit
Q: 5 names
- Quarantine Tube
- Quarry Bank Tunnel
- Quarry Hill Tunnel
- Quayside Tunnel
- Quiver Mesa Bore
R: 34 names
- Railwaymen Memorial Tunnel
- Rainwater Bore
- Ratcatcher's Sewer
- Reactor Service Crawl
- Recycler Access Tube
- Red Dust Underway
- Reedmace Tunnel
- Regolith Road
- Remembrance Tunnel
- Reservoir Outlet Tunnel
- Reverend Ashdown Tunnel
- Reversing Siding Tunnel
- Ridgeway Road Tunnel
- Riding Officers' Bane Run
- Rille Wall Gallery
- Ring Corridor Nine
- Ringroad Tunnel
- River Mouth Tunnel
- Riverbed Tunnel
- Rivergate Crossing
- Riverside Expressway Tunnel
- Riverside Line Tunnel
- Road of Nine Lamps
- Rockfall Gallery
- Rotherhithe Tunnel
- Rotwand Tunnel
- Roundtop Tunnel
- Route Nine Tunnel
- Rover Track Tunnel
- Roving Bridge Tunnel
- Rum Cellar Run
- Runaway's Road
- Rune-Lit Way
- Runegate Underway
S: 103 names
- Saddleback Tunnel
- Salt Smugglers' Road
- Saltmarsh Immersed Tunnel
- Saltway Tunnel
- Sandbar Tunnel
- Sandhogs Memorial Tunnel
- Sandstone Bluff Tunnel
- Sankt Vigil Tunnel
- Sasso Grande Tunnel
- Sawmill Creek Culvert
- Scarp Foot Tunnel
- Scenic Byway Tunnel
- Schneeberg Gallery
- Scree Slope Gallery
- Scriveners' Hill Underpass
- Sea Cave Stair
- Seabed Bore
- Seabed Colony Link
- Seafront Underpass
- Seawall Tunnel
- Second Narrows Tube
- Sector Twelve Transitway
- Sedgeley Hill Tunnel
- Seikan Tunnel
- Senator Maribel Ochoa Tunnel
- Senator Quillfeather Tunnel
- Serac Tunnel
- Severn Tunnel
- Sexton's Passage
- Shackle Rim Tunnel
- Shale Bank Tunnel
- Shieldbreaker's Cut
- Shielded Passage Beta
- Shipping Lane Crossing
S, continued
- Shoal Tube
- Shuttle Line Tunnel
- Signal Hill Tunnel
- Signalman Tate Memorial Bore
- Silberjoch Base Tunnel
- Silk Cellar Passage
- Silt Trap Passage
- Silver Street Subway
- Simplon Tunnel
- Sister Benedicta Tunnel
- Skerry Tunnel
- Skitterway
- Skylight Seven
- Skyline Drive Tunnel
- Slack Water Crossing
- Slow Water Tunnel
- Sluice Gate Passage
- Smoke Hole Tunnel
- Smugglers' Run
- Snowline Bore
- Snowshed Gallery
- Solidarity Tunnel
- Soot Alley
- Sound Crossing Tunnel
- Southbound Bore
- Spiderlight Tunnel
- Spillway Tunnel
- Spine Tunnel One
- Spring Tide Crossing
- St. Aldric's Tunnel
- St. Barbara's Gallery
- St. Brendan's Crossing
- St. Christopher's Underpass
- St. Gerold's Tunnel
S, continued
- St. Kinga's Tunnel
- Stadium Underpass
- Standedge Tunnel
- Starvationer Tunnel
- Station Road Underpass
- Station Spine Corridor
- Station Square Concourse
- Steam Tunnel B
- Steinbock Tunnel
- Stevedores' Tunnel
- Stillwater Tunnel
- Stoker's Tunnel
- Stone-Eater's Bore
- Stonecrop Tunnel
- Stonekin Passage
- Stonemother's Way
- Stonesong Passage
- Stonewall Cut Tunnel
- Stop Lock Tunnel
- Storm Relief Tunnel
- Stormhorn Base Tunnel
- Stormwater Deep Tunnel
- Strait Link
- Strata Link East
- Subglacial Lake Passage
- Sublevel Nine Freightway
- Sublevel Zero Transit
- Substation Cable Tunnel
- Subsurface Artery One
- Summit Bore
- Summit Pound Tunnel
- Sunset Boulevard Tunnel
- Surge Shaft Gallery
- Surveyor Lindqvist Tunnel
- Switchback Tunnel
T: 260 names
- Tailrace Tunnel
- Tallowgate Outfall
- Tamarack Tunnel
- Tanners' Brook Culvert
- Tar Boat Tunnel
- Tea Runners' Passage
- Telegraph Conduit
- Terminator Line Tube
- Terminus Loop
- Ternscar Head Bore
- Thaddeus Wren Tunnel
- Thames Tunnel
- Thane's Underway
- Tharsis Deep Tube
- The Airless Mile
- The Ale Road
- The Ancestors' Stair
- The Anvil Road
- The Back Door
- The Barrel
- The Basalt Way
- The Belly
- The Black Mile
- The Black Stair
- The Bleeding Stair
- The Blind Mile
- The Blind Tunnel
- The Bolt Way
- The Bone Corridor
- The Bottleneck
- The Brandy Hole
- The Bread Cart Underway
- The Brine Road
- The Bullet Bore
- The Buried Gate Road
- The Burrow
- The Cannon
T, continued
- The Capsule Line
- The Carven Way
- The Catacomb Road
- The Catacomb Walk
- The Chimney
- The Chiselled Mile
- The Chittering Dark
- The Chute
- The Coal Cellar Door
- The Coffin
- The Cold Forge Way
- The Cold Trap Passage
- The Collapsed Way
- The Cooper's Cut
- The Core Tap
- The Courier's Crawl
- The Crooked Way
- The Crosscut
- The Cryovent Way
- The Cut
- The Cutthroat Squeeze
- The Dark Half Mile
- The Dark Sector Line
- The Deep Causeway
- The Deep Thane's Road
- The Ditch
- The Dog Leg
- The Drip
- The Drowned Stair
- The Echoing Mile
- The Eclipse Road
- The Elbow
- The Express Vein
- The First Footprint Underpass
- The Flooded Corridor
- The Flue
- The Forgefather's Road
T, continued
- The Forgotten Sally
- The Fourteen Arches Road
- The Garrison Bolt-Hole
- The Ghost Mile
- The Glass Tunnel
- The Gnawed Tunnel
- The Goblin Gate Road
- The Graven Mile
- The Gravity Train Line
- The Grinding Corridor
- The Gullet
- The Gun Barrel
- The Hammerfall Way
- The Harvest Moon Tube
- The Hellas Low Road
- The Hidden Stair
- The Hollow Rille
- The Honk Tunnel
- The Howling Bore
- The Hungry Dark
- The Icebox
- The Inter-Dome
- The Keyhole
- The Keystone Road
- The Lamp Black
- The Lampwrights' Road
- The Lantern Run
- The Lightless Mile
- The Lodestone Way
- The Long Burrow
- The Long Crawl
- The Long Dark
- The Long Shadow Tube
- The Longhaul Conduit
- The Loophole
- The Lost Delver's Road
- The Low Road
T, continued
- The Mad Mason's Maze-Way
- The Mag Road
- The Marble Mile
- The Mason's Mile
- The Meridian Tube
- The Midnight Adit
- The Mole Run
- The Moonmilk Run
- The Mosaic Subway
- The Mountain's Throat
- The Mountain-Root Way
- The Mouse Run
- The Mousehole
- The Narrowing
- The Needle's Eye
- The Night Door
- The Obsidian Tube
- The Ogre's Gullet
- The Old Accelerator Ring
- The Old Delving Road
- The Ore Cart Road
- The Oubliette Road
- The Oven
- The Pavonis Skylight
- The Perimeter Loop
- The Pickaxe Road
- The Pilgrim's Descent
- The Pillared Way
- The Pipe
- The Pit Crater Stair
- The Pneumo
- The Pressure Way
- The Quiet Road
- The Quiet Sea Tunnel
- The Rabbit Hole
- The Radiation Shelter Road
- The Rat Run
T, continued
- The Ropewalk Tunnel
- The Rust-Eaten Crawl
- The Sally Port
- The Selene Underpass
- The Serpent's Coil
- The Seven Gates Road
- The Shadowed Way
- The Short Dark
- The Shortcut
- The Shrieking Hall
- The Siege Way
- The Silent Halls Road
- The Silent Sea Underway
- The Sinking Corridor
- The Slag Road
- The Sleeve
- The Slime Chute
- The Slingshot Line
- The Slipstream Tube
- The Snake
- The Spinward Passage
- The Squeeze
- The Stoneward Passage
- The Stove Hatch Tunnel
- The Stovepipe
- The Straw
- The Sunless Highway
- The Synchrotron Loop
- The Tailor's Tunnel
- The Thief's Squeeze
- The Thousand Steps Below
- The Throat
- The Tidal Crack Road
- The Tin Road
- The Titan Methane Tube
- The Trade Road Below
- The Trans-Crater Line
T, continued
- The Trapdoor Run
- The Trapmaker's Corridor
- The Trench
- The Trunkline
- The Umbra Line
- The Under-Fence
- The Under-Sea Shunt
- The Under-Sound
- The Underneath
- The Underway
- The Vacuum Line
- The Wardens' Walk
- The Weeping Corridor
- The Wet Mile
- The Whisper Crawl
- The Whispering Gallery Walk
- The Wind Tunnel
- The Winding Stair Below
- The Windpipe
- The Wire Tunnel
- The Wool Road Below
- The Worm
- The Wormhole
- The Wyrmway
- Theatre District Pedway
- Thermal Vent Passage
- Thistledown Tunnel
- Thornley Tunnel
- Three Brothers Tunnel
- Three Fathom Tunnel
- Three Locks Tunnel
- Three Mile Tunnel
- Three Peaks Base Tunnel
- Thrundar's Underway
- Thrupp End Tunnel
- Thunder Col Tunnel
- Tidal Gate Tunnel
T, continued
- Tidewater Crossing
- Tiled Passage
- Tiller's Tunnel
- Timberline Tunnel
- Tobacco Cellar Way
- Tobias Marchetti Tunnel
- Tollgate Tunnel
- Top Lock Tunnel
- Torchless Passage
- Towpath Tunnel
- Tram Subway
- Tramshed Tunnel
- Tranquil Hollow Tube
- Transit Tube Seven
- Transit Vein Eleven
- Trawlers' Tunnel
- Tre Valli Tunnel
- Trestle End Tunnel
- Troglodyte Road
- Trunk Road Tunnel
- Tub Boat Tunnel
- Tub Carriers' Way
- Tunnel Beatrix
- Tunnel Clementine
- Tunnel de la Combe Noire
- Tunnel du Grand Cerf
- Tunnel du Lac Gelé
- Tunnel Harriet
- Tunnel Marguerite
- Tunnel No. 4
- Tunnel Winifred
- Tunnelers Memorial Bore
- Tunnelwrights' Way
- Turnstile Passage
- Twin Bores of Calder Hill
- Twin Skylights Tunnel
- Twin Tubes of the Strait
- Two-Mile Dark
U: 8 names
- Under-Harbor Bore
- Under-Ice Transit Line
- Under-the-Wall
- Undercity Loop
- Unity Tunnel
- University Pedway
- Up Line Bore
- Utilidor Nine
V: 12 names
- Val Cinerea Bore
- Val d'Argent Tunnel
- Val Lunga Base Tunnel
- Val Serena Tunnel
- Val Tranquilla Tunnel
- Valve House Passage
- Vault Level Transit
- Verglas Tunnel
- Vicar's Bolt-Hole
- Victory Tunnel
- Viewpoint Tunnel
- Vista Point Tunnel
W: 31 names
- Water Board Tunnel
- Water Ice Haulway
- Waterfront Tunnel
- Wawona Tunnel
- Weaver's Arm Tunnel
- Weir Bypass Culvert
- Weisshorn Gallery
- West Dock Tunnel
- Westbank Interceptor
- Western Relief Tunnel
- Wetherby Tunnel
- Whaleback Tube
- Wharf Lane Tunnel
- Wharfinger's Tunnel
- Whistle Cut Tunnel
- Whistler's Gullet
- Whiteout Gallery
- Whiteout Tunnel
- Widowmaker Bore
- Wildbach Gallery
- Winding Hole Tunnel
- Windy Gap Tunnel
- Wine Merchant's Way
- Winter Garden Pedway
- Wintergate Tunnel
- Winterhorn Base Tunnel
- Withy Bridge Tunnel
- Wolf Creek Tunnel
- Wormbore
- Wreck Reef Tunnel
- Wreckers' Stair