My DH, FIL, and I just returned from a trip to Spain. We spent three days in Barcelona and fabulous does not begin to describe it. Because my FIL is 85 and couldn't walk, we took the Bus Turistic and that was great. You see everything, hop on and hop off. Three days was really not enough. Try to make sure you see: Picasso Museum, Sagrada Familia, Gaudi's other buildings and Park Guel, the waterfront, and La Rambla.