A World War II evacuation tunnel turned into a history display of Croatian state and people.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A roadway designed for a visiting monarch.

This sculpture forces visitors to confront their relationship with space.

A once-fairy tale mansion now stands in a state of disrepair.

A Reformation-era fiery figurehead once denoted this location as a print shop.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

Originally built by Japanese fishermen, this historic neighborhood has withstood the test of time.

California's first suspension bridge.

Rainbow shutters decorate this former police station.

Concerts, art, offices, and a café in what used to be Berlin's first crematorium.

Now home to a drinking establishment, this building has a macabre history.

It took years to decode its mysterious messages.

Art Deco stylings conceal the true nature of this bridge.

This Ottoman-era church is hidden amid a busy tourist area.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

This controversial statue once honoured a Russian Field Marshall, before ultimately being dismantled in a push to remove symbols of Russian influence.

An antique store houses the last operational diner from the defunct department store chain.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

Singing sand that stands as the final remains of an ancient lake.

A tree bears footwear on the loneliest road in America.

This Old West eatery along America's Loneliest Road was originally a stop on the Pony Express.

A whimsical, punny collection of "fence art" outside the tiny mountain town of Baker, Nevada.