Findings:
- world's longest rivers
- The Longest and Most Meaningless Movie in the world
- Extensive tunnels and underground bunkers
- Old World Underground, Where Are You Now?
- The Longest Day
- The longest scene in Shakespeare
- longest word
- Longest insult in Shakespeare
- The longest multi-word palindrome in any language
- The longest multi-word palindrome in any language: 2
- The Longest Journey
- The longest minute
- The Longest Line
- Longest burning fire
- The Longest Yard
- The Longest Path
- The longest, most complicated undelivered love letter ever
- The longest game in professional baseball history
- the longest unzipping of my life
- You never know which experiences will last longest in memory
- longest common subsequence
- Today is the longest day of year
- Longest names
- Longest science fiction story ever
- Sussex girls have the longest legs
- The Second Longest Day
- Why, Martha, for the longest time there was no railway station in Slough!
- The Longest Day of the Future
- Carpal Tunnel Syndrome
- tunnel
- bridge and tunnel
- Steam tunnel
- roof and tunnel hacking
- toad tunnel
- reality tunnel
- light at the end of the tunnel
- Tunnel of Love
- tunnel vision
- carnal tunnel syndrome
- religious tunnel vision
- Ulnar Tunnel Syndrome
- Cathy Martin and the tunnel of fire
- Tunnel in the Sky
- flesh tunnel
- Whittier Tunnel
- Provo Canyon Tunnel
- H-3 Tunnel
- Bunyard Tunnel
- Central Artery/Third Harbor Tunnel
- the tunnel song
- RIT cross-campus tunnel
- The light at the end of the tunnel has been switched off.
- No Hazmats in Tunnel
- Eisenhower Tunnel
- Dark at the End of the Tunnel
- Holland Tunnel
- Tunnels & Trolls
- Snow Tunnel Cake
- wind tunnel
- The Time Tunnel
- Shanghai Tunnel
- Tunnel in the Key of G
- Tunnel Runner
- Chesapeake Bay Bridge Tunnel
- Atlantic Avenue Tunnel
- Channel Tunnel
- Tunnel Bear
- Tunnel rat
- Tunnels of Doom
- Lincoln Tunnel
- Queens-Midtown Tunnel
- ip tunnel
- Seikan Tunnel
- Green Grass of Tunnel
- The light at the end of the tunnel
- Fort McHenry Tunnel
- Brooklyn-Battery Tunnel
- Brooklyn Battery Tunnel
- Emlen Tunnel
- Tunnel to Towers
- The Mont Blanc Tunnel Disaster
- Staple Bend Tunnel
- Freedom Tunnel
- Baltimore Harbor Tunnel
- Fort Pitt Tunnel
- ribonucleotide triphosphate tunnel
- A Transatlantic Tunnel, Hurrah!
- tunnel freezer
- Tunnel stern
- Morocco Spain Rail Tunnel
- SSH Tunnel
- Robertson Tunnel
- Through the Tunnel
- Tunnels
- You don't see the light at the end of the tunnel now, but it's there. I'm holding it for you.
- The Screaming Tunnel of Thorold, Ontario
- tunnels of Set
- The Velvet Underground
- Underground
- London Underground
- underground BBS scenes
- Weather Underground
- Glasgow Underground
- underground railroad
- Notes from the Underground
- Digital Underground
- underground newspaper
- Steady Sounds from the Underground
- underground comix
- The Velvet Underground and Nico
- Global Underground
- paisley underground
- An Underground Education
- The Princess who was Hidden Underground
- Computer underground Digest
- Asian Underground
- Underground chocolate machine hack
- underground music
- Why underground music is "better" than commercial music
- underground haggis connection
- Seattle Underground
- 6 Underground
- Going Underground
- London Underground Station Computer
- Chemikal Underground
- New Media Underground Festival
- Days of the Underground
- trees prospecting underground
- Glenn Underground
- Quilts and the underground railroad
- Poems on the Underground
- underground (user)
- To America with Love: Letters From The Underground
- You wake up slowly when you're a mile underground
- Jack to the Sound of the Underground
- The myth of skateboarding as an underground industry
- Reverse underground railroad
- Raskolnikov and the Underground Man
- Making the Movies XV Underground With a Movie Camera
- Underground Resistance
- The History of the London Underground
- London Underground Café
- The mathematical Satanic underground
- The Sticker Underground
- Tokyo Underground
- The Underground Comedy Movie
- Little Steven's Underground Garage
- Tony Hawk's Underground
- Building an underground house
- Need For Speed Underground
- The Lure of the Underground
- Otaniemi Underground Broadcasting System
- National Underground Railroad Freedom Center
- Underground talk radio
- Notes from the Underground: Part I
- Notes from the Underground: Preface
- Notes from the Underground: Underground Preface
- Notes from the Underground: Underground I
- Notes From The Underground: Underground II
- Notes From The Underground: Underground IV
- Notes From The Underground: Underground III
- Notes From The Underground: Underground V
- Notes From The Underground: Underground VI
- Notes From The Underground Contents
- Notes From The Underground: A Propos Preface
- Notes From The Underground: Underground XI
- Notes From The Underground: Underground X
- Notes From The Underground: Underground VII
- Notes From The Underground: Underground IX
- Notes From The Underground: Underground VIII
- Notes From The Underground: Epilogue
- Need for Speed Underground II
- Underground insurance
- Soudan Underground Mine
- Crushed Underground
- underground press
- A Poem on the Underground Wall
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