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

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

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

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Hindu temple of the dead home to hundreds of long-tailed macaques.

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

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

Monasteries on rock pillars, once accessible only by frayed ropes.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Steadily reminding Czechia of its past.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A surreal statue honoring Prague's favorite literary son.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Looming communist pillar with a Czech twist.

A mocking tribute to the past and modern leadership of Prague.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Crushed coral and crystals give the sand its signature coloration.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.