Macabre astrological automaton clock dating to the late 1400s.

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

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

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

These sea caves are the source of Xigia Beach's distinct aroma.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The metal leaves on this tree are engraved with the names of Holocaust victims.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This ancient Spanish castle sits high upon a hilltop.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Elevated freight railway turned wildly successful urban park.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

This institution has been serving up some of the best pancakes in the Netherlands for over a century.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.