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

Artfully arranged bones of 5,800 Austrians.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Venice's island of the dead.

Religious dwelling in a Spanish volcano.

Wonderland replication in progress by one persistent man.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

The personal charnel house of Anton Bruckner.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Avant garde house of Pierre Cardin on the Cote d’Azur.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Abandoned medieval hill town.

Norway's chilly all ice-instrument festival.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

French commune at the heart of conspiracies.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

Abandoned 18th century weapons factory in the Aezkoa Valley.

Bell tower juts out from a village buried under a lake.

100-windowed castle turned art gallery, built by one dedicated mason.

Ruins of a German Castle on top of a towering stone pillar.

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

Series of underground houses inhabited continuously for centuries.