Setas de Sevilla in Seville

You're standing on Plaza de la Encarnación, in the old heart of Seville, underneath one of the strangest buildings in Spain. Look up. Six huge wooden parasols float above you, together roughly 150 by 70 metres and about 26 metres high. It was first called Metropol Parasol, but locals instantly nicknamed it Las Setas, the mushrooms. Can you see why?