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

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

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

Wonderland replication in progress by one persistent man.

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

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

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

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

Bacteria and algae give the salty water its bubblegum hue.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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

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

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

This cemetery features modernist statues as strange as its name.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

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

An abandoned, deteriorating tuberculosis hospital from the turn of the 20th century.