This subterranean necropolis holds three floors of antler-dug grave caves.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Macabre astrological automaton clock dating to the late 1400s.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

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

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

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

France's most famous cemetery, with some of its most curious tombs.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This elephant kraal is the only one remaining in Thailand, dating back to the 16th century when these massive mammals were integral players in war and trade.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.

During the rainy season, this temple is almost entirely submerged, accessible only by boat.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

Walk through depictions of the torture inflicted on those who go to Buddhist hell.