Barcelona is Europe's most creatively charged city — a place where Antoni Gaudí rewrote the rules of architecture so completely that his Sagrada Família is still under construction a century after his death. The Gothic Quarter's medieval lanes open onto world-class art museums. La Barceloneta's urban beach is 15 minutes from the Picasso Museum. La Boqueria Market is the world's greatest food market in a single covered hall. Barcelona is also, after dark, one of Europe's most compelling cities.