The gates are open to some of history's most sinister structures. From the terrifying Tower of London to a hotel of horrors, discover the dark secrets hidden within these foreboding fortresses.

Whether they're used to stop treasure hunters, body snatchers, or wartime enemies, booby traps are diabolical devices just waiting to kill.

The twisted origin stories of some of history's most diabolically creative, and brutal, torture devices; from the "Iron Maiden" to the pear of anguish.

From the destructive Viking axe, to the sacred but deadly Samurai katana, razor sharp blades wielded by fearsome warriors have spilled blood and forged empires.

From the world's largest trebuchet to Nazi super cannons, these are the deadly weapons that rain destruction and spread fear on the battlefield.

An exploration into the dark art of spy-craft, from the frankenkitty to the umbrella gun, reveals the deadliest spy weapons deployed to gather information and assassinate enemies.

From ancient times through the modern day, brutal games thrill both players and spectators. Explore the origins of history's deadliest games--from Roman bloodsports to Russian Roulette.