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

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

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

Of course Salvador Dalí lived in a castle...

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

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

A once-secret library of Freemason history in Catalonia.

A charming Spanish village sits atop this natural limestone overpass.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

Mysterious Spanish catacombs of unknown origins.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

Stunning Roman aqueduct used for 1900 years and still standing.

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

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

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

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

Village situated on a narrow volcanic escarpment.

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

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

A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

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

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