Cities of the Underworld (2007)

S02E05 Hitler's Last Secret

Tread carefully—history lurks beneath your feet! Prague, a city shrouded in intrigue, boasts a hidden subterranean world. Its medieval castles conceal ominous dungeons beneath their stone facades. From quarries rumored to be the storage sites of Hitler's most formidable weapon to mines that served as Communist labor camps, Prague holds astonishing tales. Join host Don Wildman as he uncovers the groundbreaking innovations that enabled the remarkable layering of one city atop another—quite literally.