Take on the streets of Barcelona's old town, Spain’s Catalonia region's cosmopolitan capital, which is known for its art and architecture. The fantastical Sagrada Família church and other modernist landmarks designed by Antoni Gaudí dot the city. Museu Picasso and Fundació Joan Miró feature modern art by their namesakes. City history museum MUHBA includes several Roman archaeological sites. Drive-by Camp Nou in an open-top vehicle, GoCar, using GPS technology to tell you where to go.