A once extravagant mansion, now reduced to ruin.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

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

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

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

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

A beautiful but toxic fountain of mercury.

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

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

This Funeral Hearse Museum represents the finest in cadaver transportation.

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

Mountain where Jesus was first tempted by the Devil.

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

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

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

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

This cemetery features modernist statues as strange as its name.