World's only nuclear reactor operated by liberal arts undergraduates.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This famous city eluded concrete detection until the early 2000's.

Extravagant mosque honors modern Islam.

Geometry and mystery come together in an epic show of octagonal masonry.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

This massive, ancient stone was disassembled and then put back together again.

New Orleans' famous cemetery, located on the site of a former race track.

A beautiful final resting place with some surprising residents.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A submerged archeological park still holds the wonders of a Roman Sodom.

A bay of elaborate, historic toilets are held in high esteem at this Scottish dock.

Breathtaking and huge 430 year old maps of Italy.

A series of five defunct panopticon prisons in Cuba.

Home to the most complete dodo remains known - one head, and one foot.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

A sacred mountaintop temple offers a fine cup of tea to visitors who can survive the journey.