An ancient Egyptian temple in the middle of Madrid, Spain.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A field of nothing but boulders which resembles a giant's gravel driveway.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

This park contains a number of standing stones meant to heal and inspire.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

The capitol city's oldest existing cemetery.

I Street Bridge is the heaviest swinging center bridge in the United States.

The California capital city once stood 10 feet lower than it does today.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.