The Metropole Parasol is one of the world's largest wooden structures, built as a way to make the Plaza de la Encarnacion a more welcoming and cooler place. For years the plaza has been used as a parking lot and was considered as a touristic dead spot. It now contains a market, some shops and a venue for concerts and other events. Roman ruins lie below the structure, which were discovered during excavations to build an underground car park. It is visually very striking, but not without some controversy, as it is held together by glue. Worth a visit next time you're in Seville.