An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

An abandoned, deteriorating tuberculosis hospital from the turn of the 20th century.

A tilted half-timbered house from 1672 is built into a salvaged segment of a medieval wall.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This collection of Dwarf beech trees were once believed to be enchanted trolls in disguise.

A peat bog in southern Sweden provides a cozy and photogenic home for junked Volvos, Saabs, and the occasional American muscle car.

A geological wonder that helped fuel myths of trolls and giants.

The only remaining U-boat that is still floating never actually saw any action in World War II.

Giant wind turbine with observation deck at the very top.

There are two dozen tanks just sitting in an open field in Lower Saxony.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

Bell tower juts out from a village buried under a lake.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The final resting place for the remains of 143 Habsburg royalty.