Giant, pink stuffed rabbit on an Italian mountain.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Countless grotesque faces stare out from this eerie Prague art wall.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

It's always summer at the beach inside this former airship hangar.

This unique Renaissance castle was turned into a home for Nazi occultism.

Ruins of a German Castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.