Mysteries of the Abandoned

Labyrinth of the Dead (4x4)

Air date: Apr 25, 2019

Tunnels filled with human bones lie beneath the streets of Paris, and this horrifying engineering marvel points to a dark secret. New discoveries reveal why this grisly underground death maze was built. Stories: 1) Kienbaum, Berlin, Germany; 2) The Catacombs, Paris, France; 3) Fort Loncin, Liege, Belgium; 4) Cape Romano Dome Home, Florida, USA