Season 15 - Episode Guide

Exploring a complex in New Jersey infiltrated by a notorious gang, a tranquil Japanese island with a poisonous legacy, and a top-secret bunker in Lithuania.

Exploring a serene institution in Wisconsin seized out of righteous anger, a Spanish settlement stained in innocent blood, and a subterranean lair in France with a disturbing objective.

Nazi towers in Berlin that were defended to the bitter end by child soldiers, a Chicago institution that was the largest of its kind, and an odd vision in the Malaysian jungle.