This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Terrifying derelict military hospital once housed a recuperating Hitler.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

A stairway to heaven, or to nowhere at all.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Where once there was a train station bathroom, there is now this German burger joint.

A striking 12th-century-style castle built on the edge of a cliff.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A wunderkammer of mysterious objects and stories.

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

A surreal museum of extraordinary industrial objects.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

One of the world's longest murals depicts the history of diversity in Los Angeles.

Along a California highway is a kind of Jurassic Park made of metal.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

Lemon Grove, California is known for its giant lemon...and mummified bodies.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

From Japan to Italy, this California park explores the world's cultures through their gardens.

The location of the last stand of Charles Manson's doomsday cult.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.