Abandoned Engineering: Season 5, Episode 3

5 - 3: Escape from Devil's Island

Including an exploration of the claustrophobic prison cells of Devil's Island; Vemork, a vast mountainside complex that held the power to change the world; Salton Sea, where a string of crumbling towns are linked by a toxic secret; and Ralsko, a sprawling secretive base that's been left standing on deadly ground.