A self-built castle made by a mysterious man.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

This collection of neon icons is preserving Arizona's history, one sign at a time.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

This enchanting mountain plateau celebrates spooky local folklore.

At this unusual park, domes, ladders, chairs, and more are made from trees.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

Thousands of flowers create enchanting pink tunnels over the city streets.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

These 18th century gardens tell a rocky story of the son of Odysseus.

"The most colorful grottoes of the world.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Ruins of a German Castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.