The bright blue, inflatable plastic membrane acts mainly as a playground and exercise ground for children.
Arteplage
Yverdon-les-Bains
Photos: ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Hans-Peter Bärtschi / SIK_03-073534 / CC BY-SA 4.0; are still missing - send us yours! expo.02(at)ex-expo.ch
