This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

Microscopic scenes; some call it novelty, some call it art.

Bohemian paradise covered in majestic forests.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A crucified and bearded female saint.

Two stunning 17th-century libraries and a cabinet of curiosities.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A saintly relic hidden in a Prague church basement.

Monument to a suicide protesting the Soviet invasion.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

Czech architects borrow from the nest design of the stork to revitalize a farmstead, hoping to inspire the same loyalty the birds had shown.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

Tiny communists hammer away on the Olomouc Astronomical Clock.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A 16th-century horror show built in a lovely Italian garden.

The somewhat misnamed 'Garden of Shells' lovingly built from found objects.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A musical instrument played by the sea.

Abandoned medieval hill town.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

Art and a pun, all in one.