Volcanic rocks ground down into sand make this Spanish beach as black as night.

Cliffside houses provide a spectacular view from their perch above the valley.

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

The chefs at El Diablo use heat generated by an active volcano to cook the food.

An isolated village literally built into the crevices and rock formations of a mountain.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

A completely underwater art museum sends a stark message about humans' impact on the environment.

A Spanish town built into the cliffs.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

The world's largest wooden structure.

A landscape decorated with enormous skull sculptures.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This house's itty bitty size means no humans allowed.

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

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

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

Wonderland replication in progress by one persistent man.

An architect transformed this abandoned cement factory into his castle-like workshop.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

Bacteria and algae give the salty water its bubblegum hue.