You need a good walk after a filling lunch and the best place is the Olympic Park. It's easy to spot almost from everywhere due to the 135-meter TV tower built for the 1992 Games. The design symbolises a torch-bearing athlete. Better come after midday to see how the sun is playing on the squares and spaces of this futuristic park. The best way to get there is taking escalators from Spain Square along the National Art Museum of Catalonia (you won't miss this enormous palace). No entrance fee.