Vladimir Putin had a massive underground lair ... doors at the end of the tunnels on the beach side. Mr Galeotti compared the structure with a series of top-secret tunnels beneath Moscow, known ...

archaeologists stumbled on a system of secret underground passageways. They found six intersecting tunnels that functioned as a hidden transportation network. A partial map of the hidden ...

Some of the tunnels were likely used by ... and laser scanning to build up an accurate map of the subsurface under the castle—and all the underground structures hidden within.

Deserted over time, the tunnels stretch nearly 200 miles ... can’t resist the temptation to trespass underground via sidewalk manholes and secret trapdoors. The stories have become legend ...