This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

A contemporary art installation housed within a Gothic cathedral.

This 47-story "M" needed 20 years to be completed

This local emblem is the oldest and largest dragon tree in the Canary Islands.

Geological storytelling.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

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.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

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

The world's largest wooden structure.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

The final resting place of the great navigator, or maybe his brother.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

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

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Turntable anonymously received orphans, alms, and groceries.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.