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 The Black Hills and Deadwood 01:31 Wind Cave National Park 02:50 Custer State Park 01:40 More Videos Mt. Rushmore National Memorial 02:23 Black Hills & Native Americans 02:09 Fireworks at Mt. Rushmore 01:52 Mt. Rushmore Maintenance 02:40 Nashville: Top 10 Locals List 06:18 Crazy Horse Memorial 02:09 America's Stonehenge 01:57 Nashville's Parthenon 02:36 Black Market Spirits 03:06 First Nuclear Test in History 02:29 A Life-Saving Vaccine 02:47 Part of Earhart's Plane Found? 04:05 Deadly Legionnaires' Disease 03:45 Byrd's Perilous Arctic Flight 02:54 Meet Balto, Hero Sled Dog 03:17 See Shrunken Human Heads 04:00 We Recommend Monumental Mysteries Special 9 Photos Greatest Mysteries: Sturgis Pictures 10 Photos Monumental Mysteries: Escape From Slavery Pictures 9 Photos Mysteries at the Museum 11 Photos
