Mountain where Jesus was first tempted by the Devil.

One of Europe's largest supercomputers is housed inside of a disused chapel.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

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

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

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

This Funeral Hearse Museum represents the finest in cadaver transportation.

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

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

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

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

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

A beautiful but toxic fountain of mercury.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

A once-secret library of Freemason history in Catalonia.

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

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.

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

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

Turntable anonymously received orphans, alms, and groceries.

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