This impressive chasm is one of the longest natural underground cavities in the world.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

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

This museum started by a curious collector is now a place for believers and skeptics alike.

This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

Historic medieval fortified city in southwest France.

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

Village situated on a narrow volcanic escarpment.

Religious dwelling in a Spanish volcano.

A Romanesque tower appears when water levels drop.

Of course Salvador Dalí lived in a castle...

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

Mountain where Jesus was first tempted by the Devil.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

This museum is known as the "Land of the Dinosaurs," but its full-scale dino models are just the start.

"Alleys of Stone" form natural mazes in Spanish natural park.

This Arab fortress was once the largest citadel in Western Europe.

The ruins of an ancient Celtiberian town with incredible rock-cut buildings and a Roman aqueduct.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.