Two New York rooftops are home to the largest rooftop soil farms in the world.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

The decaying remains of a 1960s mechanical wonderland that never officially closed.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

This Danish castle is supposedly haunted by a woman too independent to not be a witch.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

A slice of central Asia in the middle of Berlin.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

A Nazi concentration camp and Anne Frank's place of death.

A little sculpture with a large wardrobe.