London Aquatic Center by Zaha Hadid
This Aquatic Center has a very fluid design concept to compliment its use and the contents of the building. It contains 3 pools, 2 50 meter pools and 1 25 meter pool. There are Olympic diving platforms as well. The center is part of the Olympic Park Masterplan and sits at the center of the park. The arches and soft edges also help with the echo that comes with having a large pool indoors. The center was built to accommodate 17,500 spectators.
This ArchDaily article explains the specs and design of the center in more detail: