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

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

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...

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

The earliest known map to show America, discovered by accident at a Paris bookshop.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

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

The world's largest wooden structure.

A landscape decorated with enormous skull sculptures.

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

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

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

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.

A stately palace has been converted into the world's largest cannabis museum.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

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

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Bacteria and algae give the salty water its bubblegum hue.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

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