Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Geothermal waterfalls in Tuscany.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A miniature train-ride through Slovenia's largest cave system.

A whimsical bridge adorned with decorative dragons.

This massive subterranean fissure is known as the "underground Grand Canyon."

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This Italian foot path winds through the mountains via 52 individual tunnels.

This one-time health resort was used by aristocrats around the world.

These delicate sand pyramids look like naturally occurring gothic spires.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.