A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

A small 12th-century temple surrounded by waters believed to have curative properties.

A battle between nature and architecture in the Cambodian jungle.

The bank's whimsical shape was inspired by a child’s toy.

A haunting memorial to Africans kidnapped and lost at sea during the slave trade.

A house carved into a rock in the 1940s.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

Medieval torture techniques with a modern conscience.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The world's brightest bioluminescent bay.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

New Orleans' famous cemetery, located on the site of a former race track.

The ghost town where the villagers refuse to leave.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This striking, two-toned confluence of rivers is visible from space.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

Twelve natural mummies are displayed in the crypt of this former monastery school.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.