The first declared National Monument in the United States.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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

Windblown rock formations in an ancient Roman quarry.

A gorgeous stone viaduct crosses over a bucolic valley.

Two stunning 17th-century libraries and a cabinet of curiosities.

The hidden lair of an alchemist rediscovered in a 2002 flood.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

An existential riddle in the world's largest ancient castle.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A crucified and bearded female saint.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

Enormous sandstone towers loom within a Czech forest.

Monument to a suicide protesting the Soviet invasion.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This Polish cave has housed a dragon, a brothel, and an enduring legend.