Sitting on a 50,000-square-meter plot of waterfront land, Flußbad Lichtenberg was one of the largest and most modern riverside baths in Europe, incorporating many of the newest ideas and technologies of its time. One such state-of-the-art concept was the use of waste thermal energy: water from the neighboring Klingenberg power plant was used to heat the bath's warm pool.
The size was not an obsession with making things big. It was, rather, a practical response to the catastrophic conditions of public hygiene in post–World War I Berlin. Its architect and engineer, Rudolf Gleye, was a municipal building official whose professional background was deeply rooted in sanitation and urban infrastructure. The Flußbad was therefore more than a place for recreation. It was part of a larger modernist idea: that public health, technology, fresh air, exercise, and access to water could be brought together in a single civic institution.
Opened on May 21, 1927, the complex occupied some 50,000 square meters, including a vast 26,000-square-meter sandy beach. There were four pools, a 10-meter diving tower, changing and shower facilities, kiosks, and other buildings. On hot summer days, thousands of Berliners came here—at times as many as ten thousand in a single day. For a city whose ordinary relationship with water was increasingly shaped by industry and sewage, this was a remarkable piece of the modern metropolis: a seaside resort of sorts, built into an industrial landscape.