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

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.

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

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

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

The Gaudí-inspired building that was the start of Terrassenc modernism.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

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

Mountain where Jesus was first tempted by the Devil.

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