Nazi Megastructures

Hitler's alpine retreat in Bavaria is fortified with 2,000 SS troops and protected by a high-level security system.

Nazis built some of the biggest and deadliest pieces of military hardware in history.

Nazis built some of the biggest and deadliest pieces of military hardware in history.

The Type 21, Hitler's sea-faring super weapon, was the world's most advanced submarine.

The Japanese design the Yamato, the world's most powerful battleship.

Japanese generals construct a network of defenses and tunnels on Okinawa, creating a devastating killing ground for American troops.