Villas that once served as playgrounds for the rich now fall away in decay.

This small museum is dedicated to one of the most influential, yet obscure, jazz legends of Prohibition.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

This small museum tucked within a subway station holds pieces from Madrid's past.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

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

This enchanting natural park is a magical example of a temperate rainforest in Europe.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Rare karst landscape eroded from a flat seabed.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

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

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

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

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

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

The morbid items in this small and hidden museum are not for the weak stomached.

A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

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

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