Waterworks Friedrichshagen, Industrial museum in Treptow-Köpenick, Germany.

Waterworks Friedrichshagen is a waterworks built between 1889 and 1899 to designs by Henry Gill, covering 55 hectares in Treptow-Köpenick. Its brick buildings, planned by Richard Schultze, include six engine houses, three pumping houses, 34 slow sand filters and four workers' dwellings. Since 1987 a disused section has housed the Museum im Wasserwerk, where the machine hall with late-19th-century steam engines is on view.

The facility was built in 1893 to improve Berlin's growing water supply. The project resulted from collaboration between architect Richard Schultze and engineer Henry Gill.

The place shows how Berlin developed its water supply over time. The displayed machinery and control panels allow visitors to understand the technical achievement behind it.

Visitors can take guided tours through underground passages, machine rooms, and former powerhouses to learn about the technical development of water management. The site is best explored with expert guidance, as many areas feature complex systems.

The site covers 55 hectares, yet the fourth and final construction stage planned by Henry Gill was never built. The museum opened in 1987 in a disused section of the works, and its machine hall with late 19th-century steam engines is the part visitors single out.