Season 5 - Episode Guide

Scorched remains that speak of imprisonment and torture... the desert town that faced a disaster of biblical proportions... a rusting cab leway leading to a deadly site in the mountains of southern Africa... vast coastal ruins that reveal a past once wiped from history.

The underground base with the power to destroy a nation… the site linked with an attempt to kill a vicious dictator… an ancient world discovered in the open American wilderness... the tropical island with a history of violence.

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.

Including an exploration of a secretive underground base that concealed the power to destroy nations; Willamette Falls, a sprawling industrial relic clinging to the edge of an unforgiving waterfall; strange constructions, separated by a century, but joined together by war; and Pilgrim's Rest, a hauntingly silent town lost deep in hills of South Africa.

Including an exploration of a marooned iron-clad structure in Portland, off the coast of England, that hides a dramatic story of war and resilience; Pratt Cotton Gin Mill, a vast facility in the heart of America's deep south that helped tear apart a nation; and a Mediterranean island fortress at Spinalonga, Greece, that became the scene of a dark conspiracy.

Including an exploration of forgotten relics from the defence of America's homeland, at Fort Jackson, USA, concealed by the banks of the Mississippi River; a concrete behemoth at Lorient Sub Base, on the coast of France, that proved invulnerable to enemy bombardment; and a ghostly ruin at Gwrych that is now home to a haunting presence.

An American prison for the violent and deranged with links to an infamous cult leader, and a cavernous tunnel network in France offering shelter from unrelenting bombardment.

An Albanian village home to Allied secret agents, devastated for resisting the Nazi war machine, and a notorious asylum in America that enforced labotomies on a large scale.