Left: The aquatics centre (diving and swimming) in the Olympic Park in East London with temporary wings by architect Zaha Hadid. With the temporary wings the building can accommodate 17,500 people. After the games it will be reduced to 2,500 seats by removing the wings. Right foreground: The temporary water polo venue which will be taken down after the Games with elements expected to be reused or relocated elsewhere in the UK. Right background: the main Olympic stadium, 30 % of which is made from recycled materials. Middle: The Orbit Acelor Mittal monument by Anish Kapoor. .