This magnificent multi-functional sporting arena was designed by Japanese architect Arata Isozaki as a symbol of Barcelona's brave modern future. It's an incredible piece of avant-garde architecture, an "intelligent" building in which everything is controlled by computers. The 45-meter (150 foot) high dome was built on the ground and lifted up to its present position over ten days of arduous labor. The complex is used for sporting events, pop concerts, theater performances and other spectacles.