The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

Striking occult iconography on a medieval German church.

Long tunnels run under the ancient chariot racing circuit to the tower.

This Roman arena once played host to bloody gladiatorial battles.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

This amazing piece of modern art honors the hundreds of fishermen killed during Cambrils' "year of misfortunes."

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This abandoned five-star hotel is now a five-star urban exploration destination.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The Andean town where every single building is decorated with a brightly colored frieze.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

A museum of memories in what was once one of the most violent cities in the world.

The (usually) serene burial place of the world's most notorious drug lord.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.