Some of the ancient-looking huts among these strange rock formations aren't ancient at all, but built as part of a movie set.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The only visible remains of this ancient Greek underground temple is its roof protruding from the earth.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

Elaborate patterns adorn the city's disappearing traditional architecture.

This synagogue is covered in beautiful mosaics that explore the history of the Jewish people.

Vast stretch of tide-pools with a unique Moroccan charm.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The ruins of an ancient fortification wall sit in front of and underneath this boutique hotel.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Where the line between entertainment and aerospace blurs.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

Rotting dome home spotted near Chapel Hill, North Carolina.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A prehistoric cave in Spain contains paintings dating back to the Ice Age.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.