Mysterious face-like images that appeared within an Andalusian house are surrounded by legends of the paranormal.

This palatial, 99-doored Colonial mansion is a marvel of architectural fusion.

A stunning hermit's shrine on a steep rocky spur in Northern Italy.

A thick blanket of beautiful pampas grass cloaks this unique Japanese landscape.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

This underwater cave in Madagascar is home to what is thought to be the country's largest fossil graveyard.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

Obscure Freemasons still live in D.C.’s largest private residence.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

The dramatic upward-curving roof is one of the most iconic examples of Googie architecture that still stands today.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

Though technically an illegal structure, this eclectic DIY apartment complex is beloved by its residents.

The trailblazing Swedish businesswoman created a beloved minty candy called polkagris.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

During its heyday, the massive estate boasted its own railroad station and post office.

A network of sandy streets lined with verdant fukugi trees weaves throughout this tiny seaside town.