The most visited, and possibly most controversial, museum in Germany.

Explore 10 acres of environmental sculptures.

The world's longest known cave system.

Stalactites and stalagmites in a beautifully lit cave.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A hip bar decorated with walls of golden skulls.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A gargantuan crystal kingdom.

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

This shop specializes in oddities and Victorian-inspired wonders.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A seemingly endless landscape of pure salt stretches far across Bolivia.

One man's homage to the sun continues to grow like a glass fractal.

Mysterious rocks that ring musically when struck.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A submerged archeological park still holds the wonders of a Roman Sodom.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An enormous, inside-out glass globe built in 1935.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A trash dump made beautiful by nature's power.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A one-of-a-kind collection of a unique medium.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

An ancient capital city that dates back 3,000 years old and harbors many surprises.