Remnants of cone-shaped fascist bomb shelters in Milan.

Vast network of air raid tunnels beneath Lombardy's capital.

The fairy tale castle of the "fairy-tale king."

Sausages, schnitzel, and weiners.

First museum dedicated to the research and history of Epilepsy.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

Eclectic final resting place of the controversial explorer.

A Cold War command center is hidden under an idyllic countryside.

Remains of a station that only operated for one year.

A 1,500-year-old ghost settlement is slowly fading away.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

Ancient Greek oracle of the dead.

Mediterranean castle on a tiny Turkish island.

Packed to the ceiling with antique taxidermy and hunting arms.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A Turkish ghost town abandoned in a population exchange with Greece.

Cave on extinct volcano, once home to famous mathematician Pythagoras.