A famous flea market artist's studio that's full of odds and ends.

A sprawling collection of over 106,000 toys from around the world.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

This 15th-century aqueduct with distinctive pointed arches was used for irrigation in the Vinalopó valley.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

Barça football fans might see the insignia hidden in a church window as a divine sign.

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

A once-secret library of Freemason history in Catalonia.

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

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

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

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

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.

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

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

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

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