Naturbad Riehen natural swimming pool

7 Natural Swimming Pools That Are Completely Chlorine-Free1/7

Riehen, Switzerland, has a naturally filtered pool with a contemporary design courtesy of acclaimed Swiss architecture firm Herzog & de Meuron. Inspired by the traditional wooden pools found within the Rhine River, Naturbad Riehen replicates the experience of bathing in a lake by using aquatic plants and other biological filters to keep the water clean.