A look at what went into building Hitler's infamous hideouts, including the fortified Wolf's Lair, the Fuhrerbunker and the alpine retreat known as the Eagle's Nest.

Hitler's megalomania led him to construct the ultimate deep-sea destroyer, the largest tank the world has ever seen and a fighter jet that inspired a revolution in aerial warfare.

A look at Hitler's deadly defences. The Siegfried Line held off US forces for six months, while the ambitious Atlantic Wall faced the ultimate test on D-Day.

The story of the Nazi geniuses who created Hitler's deadly weapons of vengeance, including the world's first-ever cruise missile and long-range rockets.