The Longest Hidden Tunnel in Every US State (And What's In Them)

The United States is laced with tunnels... and most people walk over them every day without realizing it. Some were built for trains. Some for war. Some for water, power, or escape. And some were designed to stay completely out of sight. In this video, we break down the longest hidden tunnel in every U.S. state, all 50 of them. And uncover what they were built for and why they still matter today. From Prohibition-era passageways to Cold War corridors and tunnels that stretch for miles under major cities, this is the underground America most people never think about. And once you see how deep these tunnels go… you’ll never look at the ground the same way again. ► The Largest Underground City in Every US State (And What They're Hiding)    • The Largest Underground City in Every US S...   ► Delaware Has a Secret Nobody Talks About    • Delaware Has a Secret Nobody Talks About   ► The Deepest Cave in Every US State (And What's Hiding Inside)    • The Deepest Cave in Every US State (And Wh...   While we do our best to provide you with the most accurate information. These are after all just our take based on data we analyzed. You should make your own decisions based on your own experiences by visiting the places we talk about! SUBSCRIBE for new videos WEEKLY! Thanks for watching Across The Globe! We put out top ten videos where we share facts and opinions about the world and its geography! If you're a curious person and are intrigued by travel then this is the channel for you! #acrosstheglobe Introduction: 0:00 - 0:50 Alabama: 0:50 - 1:39 Alaska: 1:39 - 2:25 Arizona: 2:25 - 3:09 Arkansas: 3:09 - 3:57 California: 3:57 - 4:44 Colorado: 4:44 - 5:33 Connecticut: 5:33 - 6:17 Delaware: 6:17 - 7:10 Florida: 7:10 - 7:56 Georgia: 7:56 - 8:33 Hawaii: 8:33 - 9:24 Idaho: 9:24 - 10:15 Illinois: 10:15 - 11:00 Indiana: 11:00 - 11:46 Iowa: 11:46 - 12:36 Kansas: 12:36 - 13:21 Kentucky: 13:21 - 14:15 Louisiana: 14:15 - 14:59 Maine: 14:59 - 15:49 Maryland: 15:49 - 16:31 Massachusetts: 16:31 - 17:23 Michigan: 17:23 - 18:04 Minnesota: 18:04 - 18:49 Mississippi: 18:49 - 19:32 Missouri: 19:32 - 20:22 Montana: 20:22 - 21:08 Nebraska: 21:08 - 21:54 Nevada: 21:54 - 22:42 New Hampshire: 22:42 - 23:24 New Jersey: 23:24 - 24:14 New Mexico: 24:14 - 25:06 New York: 25:06 - 25:47 North Carolina: 25:47 - 26:29 North Dakota: 26:29 - 27:14 Ohio: 27:14 - 27:57 Oklahoma: 27:57 - 28:41 Oregon: 28:41 - 29:27 Pennsylvania: 29:27 - 30:09 Rhode Island: 30:09 - 30:56 South Carolina: 30:56 - 31:42 South Dakota: 31:42 - 32:28 Tennessee: 32:28 - 33:16 Texas: 33:16 - 34:05 Utah: 34:05 - 34:52 Vermont: 34:52 - 35:35 Virginia: 35:35 - 36:23 Washington: 36:23 - 37:09 West Virginia: 37:09 - 37:55 Wisconsin: 37:55 - 38:44 Wyoming: 38:44 - 39:31 Outro: 39:31 - 39:35