This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

This Shetland Islands bus shelter may be small, but it squeezes in a couch, a desk, some art, and even an old telly.

This remote Scottish isle is only inhabited by seals, birds, and the memory of a tragic settlement.

Two massive boulders, rocking back and forth with the ebbing of the sea.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

The ghost town where the villagers refuse to leave.

A Romanesque tower appears when water levels drop.

An Italian hillside ghost town.

The abandoned village of Skarð aptly illustrates the idiom "Don't put all your eggs in one basket."

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

Despite finally receiving electricity in 1970, this tiny town is now deserted.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Abandoned medieval hill town.

This shell of a historic manor house on the Isle of Wight is said to be the most haunted site on the island.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.