What he found was the first of over 600 hidden entrances to Derinkuyu, the largest excavated underground city in the world.

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A think tank has unveiled ambitious plans for a high-speed train that would stop in every single European country. The proposed Starline service, put forward by 21st Europe in March, would operate ...

Seattle City Light has substantiated misconduct allegations against 33 employees following a two-year investigation into a workgroup responsible for maintaining the city’s underground electrical ...

On July 31, 2014, a gas leak beneath Kaohsiung’s streets turned the city into a war zone. Roads erupted. Lives were lost. And it all started with one hidden crack. America’s Second-Richest ...

IShowSpeed took gravity as a suggestion and performed an Insane backflip off a bridge in Chongqing's Cyberpunk City underground because walking was apparently too simple. Caught on his aerial drone, ...