Santiago Calatrava’s 2004 Olympic Park, which features multiple stadiums and a pool, was given a facelift. Crowning the main stadium is the famed architect’s signature wing-shaped canopy. Visitors can attend major sporting events and concerts here, and take guided tours (at €3 per person, with a minimum of 15 people). Those wandering independently have the opportunity to admire the Wall of Nations, with its striking white curves.