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 Mt. Rushmore Maintenance 02:40 More Videos Black Hills & Native Americans 02:09 Fireworks at Mt. Rushmore 01:52 Custer State Park 01:40 Mt. Rushmore National Memorial 02:23 Nashville: Top 10 Locals List 06:18 Crazy Horse Memorial 02:09 America's Stonehenge 01:57 Nashville's Parthenon 02:36 Deadly Legionnaires' Disease 03:45 A Life-Saving Vaccine 02:47 The Invention of Chewing Gum 03:02 Did a Cow Cause Chicago Fire? 02:51 Captured U-Boat Helps Win WWII 02:37 The Coney Island Sideshow 02:21 Crash at Area 51 01:59 New Orleans' Cultural Hub 01:23 We Recommend Monumental Mysteries Special 9 Photos Mysteries at the Museum 11 Photos Greatest Mysteries: Sturgis Pictures 10 Photos Monumental Mysteries: Escape From Slavery Pictures 9 Photos
