Replay Video We're sorry, there seems to be an issue playing this video. Please refresh the page or try again in a moment. If you continue to have issues, please contact us here. WATCH Loading Video... Discovery Exploration: Larson Airbase Titan I Missile Silo 01:19 More From This Show Once at the forefront of America's nuclear defense system, the Larson Airbase's Titan I Missile silos now lie abandoned and flooded with groundwater. Similar Topics: Related Videos Discovery Exploration: Vemork Hydroelectric Power Plant 01:09 Psst! There's Gold in Space 02:06 How Mummies are Made 01:29 Tanzania - Home of the Serengeti 01:12 The Descent of Kukulkan at Chichen Itza 01:27 Season 2 Sneak Peek 01:12 Terror and Glory: 1945 |Trailer 02:48 Expedition Unknown | The mystery of the Dead Sea Scrolls 01:26 More Videos Expedition Unknown | Finding the Dead Sea Scrolls 01:23 Clayton Phipps Makes History 01:49 Solo Ocean Row Record 02:19 EXPEDITION TO THE EDGE | Trailer 00:29 Alaska the Last Frontier | Season 10 Trailer 02:24 The Famed Ark of the Covenant 01:06 NASA's VIPER MIssion 01:37 Check out the Crab Nebula 01:04 Celebrating Hubble's Legacy 00:57 That's a Big Black Hole! 01:43 The Kuiper Belt 02:29 Hubble's Greatest Moments 05:05 Space Out | How Giant Stars Die 01:53 How the Universe Works | Journey Through the Cosmos with Mike Rowe 00:29 State-Of-The-Art Firefighting 01:18 Phantom Signals | Skyquakes are Rattling Residents Around the World 00:57 We Recommend North Sentinel Island Is Home to the Last Uncontacted People on Earth Female Firsts: Meet Dr. Sylvia Earle One of the Bermuda Triangle’s Greatest Mysteries May Have Been Solved! Neuschwanstein Castle Is A Disney Inspiration Designed By A Mad King New Year, New Adventures: What the World has to Offer 5 Wonders You Probably Didn't Know Were Man-Made