A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

This church sits upon a peaceful hill and a long, turbulent history.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

This beautifully deceptive waterfall is something far different from what it appears to be.

A hacienda that features all things uniquely Yucatán.

Costa Rican accommodation resembles a crash site, but with a nice balcony.

Sloth rehabilitation center in the jungle of Costa Rica.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.