On the top floor peripheral route, visitors stand virtually in the open air – directly beneath the Etfe membrane. Here, they can feel a pleasant breeze or the unre lenting sun.

On the top floor peripheral route, visitors stand virtually in the open air – directly beneath the Etfe membrane. Here, they can feel a pleasant breeze or the unre lenting sun.

Image credit: Frank Kaltenbach / selgascano: © VG Bild-Kunst, Bonn 2018