23 Underground Structures No One Knows About
Massive underground structures no one knows about! #underground #undergroundcity #undergroundstructures VIDEO CHAPTERS: 00:00 Intro 00:07 The Slănic Prahova Salt Mine, Romania 01:04 InterContinental Shanghai Wonderland 01:40 Özkonak Underground City, Turkey 02:27 The Billionaire's Bunker, Czechia (The Oppidum) 03:26 Salina Turda, Romania 04:20 Russia's Secret Arctic Tunnel System 05:29 Matmata, Tunisia 06:36 Orvieto, Italy 07:08 Cusco, Peru 07:50 Hospital Cave, Vịnh Mốc, Vietnam 09:10 Mines and Catacombs of Paris, France 10:06 Boulby Underground Laboratory, UK 11:00 Gibraltar Stay-Behind Cave Complex 11:49 Lalibela Underground Churches, Ethiopia 12:35 Cu Chi Tunnels, Vietnam 13:27 Diefenbunker, Canada 14:05 Kelvedon Hatch Secret Nuclear Bunker, UK 14:50 Metro-2, Russia 15:56 Third Infiltration Tunnel, Korean DMZ 16:48 Zipaquirá Salt Cathedral, Colombia 17:52 Temples of Humankind, Damanhur, Italy 18:45 Odessa Catacombs, Ukraine 19:42 Kome Caves Village, Lesotho 20:25 Outro We do not own the clips/images in this video. All rights go to their respective owners. This video follows Fair Use under Section 107 of the Copyright Act (1976) for purposes like criticism, commentary, and education. Current subscriber count: 20,051
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