The Alster-Schwimmhalle is one of Germany's larger aquatics centers, located in the Hamburg district of Hohenfelde.

Resting on three bearings and only 8 cm (3.1 in) thin, the concrete roof remains one the world's largest of its kind.

[3][4] Reminiscent of a butterfly –an allegory to its function as a swimming venue– the airy roof structure earned the Alsterschwimmhalle its nickname as "Schwimmoper" (Aquatic Opera).

A further major renovation is planned for 2020 to 2024 at an expected cost of 60 mio EUR, closing the facility for four years.

[5] Media related to Alsterschwimmhalle at Wikimedia Commons This article about a Hamburg building or structure is a stub.