CaixaForum Barcelona

CaixaForum Barcelona transforms a century-old Puig i Cadafalch textile factory into one of Europe's most architecturally striking galleries. Japanese architects Arata Isozaki and Aiko Miyawaki gutted the original building and lifted it off the ground, creating the illusion it's floating above a glass-walled entrance. You'll find rotating exhibitions from major international museums - recent shows have featured Picasso from MoMA, ancient Egyptian artifacts from the British Museum, and contemporary photography from Centre Pompidou.

The entrance through the glass base feels like walking under a suspended brick cathedral. Inside, the preserved industrial bones blend seamlessly with sleek modern galleries across four floors. The rooftop sculpture garden offers sweeping views over Montjuïc while the basement auditorium hosts concerts ranging from chamber music to electronic performances. The original factory's massive windows flood the galleries with natural light, making this one of the most pleasant spaces to view art in Barcelona.

Here's what most guides won't tell you: the quality varies dramatically between exhibitions, so check what's on before visiting. The permanent collection is minimal - you're coming for temporary shows. Entry is completely free, making this Barcelona's best art bargain, but the gift shop is overpriced. Skip the basement café and head to the rooftop instead - the views alone justify the visit even if the current exhibition disappoints.