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

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

The Gaudí-inspired building that was the start of Terrassenc modernism.

Spain's stunning solar energy plant.

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

Giant granite sculptures representing family on the northern coast of Spain.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

A science fiction-inspired apartment building designed by a famous Spanish architect.

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

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

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

Mysterious Spanish catacombs of unknown origins.

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

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A landscape decorated with enormous skull sculptures.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

One of Europe's largest supercomputers is housed inside of a disused chapel.

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

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

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