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.

This colorful statue welcomes visitors to a Barcelona park.

The unexpectedly beloved remnants of a controversial thermal power plant.

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

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

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