Pinterest Facebook Twitter Email Mount Rushmore's Secret 02:55 Is there a secret vault inside Mount Rushmore? Find out. From: Monumental Mysteries and A Mysteries at the Museum Special Similar Topics: History Travel's Best Related Videos The Race to the Heavens 03:13 Grand Central's Mural 03:06 Top 10 Attractions in Denver 03:44 Can a Penny Kill You? 01:44 Blood-Drenched Temples 01:34 Black Hills & Native Americans 02:09 Fireworks at Mt. Rushmore 01:52 Custer State Park 01:40 More Videos Wind Cave National Park 02:50 The Black Hills and Deadwood 01:31 Mt. Rushmore National Memorial 02:23 Mt. Rushmore Maintenance 02:40 Nashville: Top 10 Locals List 06:18 Crazy Horse Memorial 02:09 America's Stonehenge 01:57 A Life-Saving Vaccine 02:47 Remembering Charles Dickens 02:13 Theremin's Amazing Invention 01:13 Moon Rock Heist 02:44 Excavating Ice Age Fossils 02:59 Murder in the Mansion 03:30 Combat Sub Sinks Union Ship 03:59 USS Intrepid: Floating Museum 02:25 California 'Venus' Shot Dead 02:25 We Recommend Monumental Mysteries Special 9 Photos Mysteries at the Museum 11 Photos Monumental Mysteries: Escape From Slavery Pictures 9 Photos Greatest Mysteries: Sturgis Pictures 10 Photos
