So many of Europe’s most fascinating sights are literally underground. Join Rick on this virtual tour to see where the Nazis hid their stolen art in Nürnberg; descend into the deserted tin mines of Cornwall; climb deep into Poland’s Wieliczka Salt Mine to discover a huge church carved out of salt; spelunk through Slovenia’s Karst, in the vast caverns of Škocjan; creep through the catacombs of ancient Rome; and burrow under London to explore Churchill’s War Rooms — where the British government fought to survive in the darkest days of WWII.

Watch this playlist along with Rick and hear his behind-the-scenes commentary HERE.