An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

This abandoned Slovenian military barracks has become a punky-political art squat.

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

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

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

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A unique hotel for the artistic soul.

The first, and perhaps only, monument dedicated to Wikipedia.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

On this Polish road, an optical illusion makes cars seem to roll uphill.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

Brought to you by the makers of fiberglass dinosaurs.

A monument to Poland's famous alleged UFO abduction case.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

One of only two places in the world where two rivers cross each other without the waters mixing.

A World War II torpedo launch station abandoned off the Polish coast.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

A memorial to the beloved brown bear that served in the Polish army during World War II.

This imposing 20th-century castle was abandoned before it was ever completed.

Boats must transform into railroad cars to navigate this Polish canal.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.