The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

A gallery of underwater art that can be visited by man and fish alike.

A unique attraction and museum dedicated to exploring iconic roadside structures.

"The most colorful grottoes of the world.

This modern monument to pagan belief looks like it was transported straight from ancient times.

A canvas of crops grow from vibrant red soil in this terraced farmland.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

There's nothing creepier than a cemetery next to a clown motel.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A living archive of urban activism and space reclaimed.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A cave's rare beauty held a cavernous secret hidden underground.

Shrine to Japanese water-goblins, complete with their preserved body parts.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Mile-long cave system near Great Smoky Mountains.

The remains of a ruined mansion memorialize the 1906 earthquake.

Handsomely crafted representations of our round planet.

A 19th-century shrine covered with prosthetic body parts as votive offerings.

Giant, pink stuffed rabbit on an Italian mountain.

Once the home of a hermetic monk, this cave now houses a small church.

Sloth rehabilitation center in the jungle of Costa Rica.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.