#HTE

Heart of darkness: Inside the Osówka underground city

That time the Nazis hollowed out a mountain

Lurking just outside the Polish village of Sierpnica is a relic of World War II Nazi ambition. The Osówka complex is the largest and most accessible remnant of the huge Project Riese (translation: “Giant”), an effort to create an underground city capable of housing 20,000 or more Nazi troops and workers.…