realities:unlimited. Flussbad, Berlin. 2011
Holcim has given a bronze award to this project by realities:unlimited, planned to start in 2019.
From Holcim's press release: 'An urban plan for transforming an under-used arm of the River Spree in Berlin into a natural 745m-long swimming pool, the Flussbad project in the heart of the historic city creates a swimming zone equivalent to 17 Olympic-sized pools, and provides a public urban recreation space for both residents and tourists adjacent to the Museuminsel. The project, which includes a 1.8ha reed bed natural reserve with sub-surface sand bed filters to purify the water, was developed by a team led by architects Jan and Tim Edler of realities united, Germany.'
This is how it works: