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The London Aquatics Centre, designed by Zaha Hadid Architects, has been shortlisted for the 2014 Stirling Prize for architecture.
The centre, with its undulating curves inspired by the smooth flow of moving water, was a showpiece of the London 2012 Olympics. It is now a public swimming pool.
Ahead of the games "wings" were attached to the sides of the building to help accommodate 17,500 spectators. They were removed when the Aquatics Centre reopened as a municipal swimming pool in March 2014 and the extra space was no longer needed. The materials used have been recycled into part of a training centre for teenagers.
The Royal Institute of British Architects (Riba) say it was the "subsequent clipping of the wings that has allowed the building, architecturally speaking, to fly free".
Eight external doors and 628 panes of glass have been installed in place of the wings. Seating capacity is now 2,800, with an additional 200 seats available for major events.
The wave-like roof was built to rest on the building without columns to obstruct spectators' lines of sight. This gives the whole space a feeling of openness.
The venue accommodates two 50m Olympic-sized pools, a 25m diving pool with boards, a gym, cafe and a creche. The diving boards rise up to 10m from the ground in sculpted smooth concrete into the highest part of the ceiling, before curving down and up again above the swimming pool.
The site was tightly bound by a main railway line to the east and the Waterworks River to the west, with underground power lines running the entire length. It had to be accessed by a new public footpath from Stratford City Bridge.
Up to 800,000 visitors are expected each year - many of whom will be local school children. An off-peak swim session costs £3.50, adult peak times is £4.50.
The starting blocks, touch pads at each end of the former competition pool, and the lane ropes are the ones used during the 2012 Games.
BBC Riba Stirling Prize 2014
Filmed by John Galliver. Production: John Galliver, Susannah Stevens, Sarah Austin
Still images by Hufton and Crow Photography
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