Naturally formed rock city in Poland.

The final resting place of the last "gypsy king" of Poland.

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

An abandoned Jewish sanatorium is tucked within the woods of Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

What was once an underground Nazi city is now Europe's largest bat reserve.

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

A small part of Russia that does not touch any other part of Russia.

Enormous sandstone towers loom within a Czech forest.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.

This 13th century Gothic brick castle is the largest in the world by surface area.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

A haunting deserted hotel is a favorite with artists and photographers.

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

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The remains of the wrecked steam trawler can be found on the beach at low tide.

One of the most popular attractions in the small resort town of Kabardinka.

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

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

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

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.

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