Mountain where Jesus was first tempted by the Devil.

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

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

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

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

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

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

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

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.

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

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

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

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

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

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

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