The gates are open to some of history's most sinister structures. From the terrifying Tower of London to a hotel of horrors, discover the dark secrets hidden within these foreboding fortresses. In Season 1, Episode 2, "Temples of Doom." Watch new episodes of Dark Marvels, a brand new series, Mondays at 10/9c, and stay up to date on all of your favorite The HISTORY Channel shows at history.com/schedule. #DarkMarvels Subscribe for more from Dark Marvels and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Since the dawn of civilization through modern times, humankind’s capacity for cruelty and darkness has known no bounds. DARK MARVELS is a documentary series that explores the history and engineering behind the world’s most diabolical inventions. From devious torture and death devices, to terrifying weapons of war, sinister spy tools, and games that kill, these are the fascinating origin stories of the innovations that emerged from the darkest recesses of the most wicked minds. Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Twitter - https://histv.co/Twitter The HISTORY® Channel, a division of A+E Global Media, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok.