This small group of sand dunes manages to pack in a strange rainbow of colors.

At the foot of an active volcano sits a church miraculously spared by its lava.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

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

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

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

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

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

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

Brussels' favorite peeing boy has a sister.

The Devil’s own choice when he needs a drink in Brussels.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.