This generously endowed statue once stood guard outside a Roman home.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

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.

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

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

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

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

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

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

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

A once-secret library of Freemason history in Catalonia.

This Funeral Hearse Museum represents the finest in cadaver transportation.

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

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

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

Turntable anonymously received orphans, alms, and groceries.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

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.

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

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

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

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