Pinterest Facebook Twitter Email The Unidentified Flying Acorn 02:13 This acorn-shaped monument commemorates the 1965 Kecksburg, PA, UFO. From: Don Wildman, Monumental Mysteries and Kecksburg Acorn, Skyscraper Swindle, US Emperor Similar Topics: History Travel's Best Related Videos The Poison Squad 02:00 Harnessing the Force 03:15 The Baroness of Pontalba 03:01 The Elixir of Life 02:59 The Great Curveball Dilemma 03:19 The World's Oldest Profession 03:42 The Real NYC Underground 02:33 The Kidnapping of a Preacher 03:43 More Videos The News of a Lifetime 03:03 Home of the Silver Shirts 03:22 The Pulaski 02:48 The Brooklyn Enigma 04:38 The Gold Accumulator 03:15 The Michigan Triangle 03:07 The UFO Car 03:02 The Great Imposter 02:35 Lucy the Elephant 03:37 The American Venus 02:46 Overshadowed by the Titanic 04:01 Taking Down the King 02:39 Adrift in the Atlantic 02:28 Trapped Under the Sea 02:36 Who Murdered the Pastor? 02:36 The Titan II Missile Crisis 03:26 We Recommend The World's Best Places to See The Northern Lights 50 of the Most Charming Small Towns in America 50 Photos Top 10 Most Haunted Places 10 Wild West Family Adventures Florida's Best Secret Beaches No-Passport-Required Destinations 20 Photos