Abandoned waterpark turned counter-culture mecca.

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

Of course Salvador Dalí lived in a castle...

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

Commonly acknowledged as the only public monument to the Devil himself.

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

A landscape decorated with enormous skull sculptures.

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

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

Week-long block party becomes a competition for the best decorated street.

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

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

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

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This cemetery features modernist statues as strange as its name.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A beautiful but toxic fountain of mercury.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

A temple to modernity, tucked away amid Barcelona's more well known museums.

This Funeral Hearse Museum represents the finest in cadaver transportation.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

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