This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

Travelers exchange letters with woodland creatures at this mini post office.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

Longest fortress system anywhere in Europe.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Giant, pink stuffed rabbit on an Italian mountain.

What happens when you cross a mayor and a painter?

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The middle finger of modernity.

This aquarium has almost as many world records as it does fish.

The Emperor Tiberius' palace of debauchery.

The monster at the center of the Darwin Center Spirit Collection.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

A small Portuguese cottage formed between boulders in the countryside.

A saintly relic hidden in a Prague church basement.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.