Abwasser- und Sielmuseum

This specialist technical museum in Hamburg documents the history of the city's sewer and drainage infrastructure — a subject rarely given museum space anywhere. Hamburg was among the first German cities to implement a modern underground canal system in the late 19th century, driven largely by engineer William Lindley in response to the devastating cholera epidemic of 1892. The collection includes historical pumps, pipe sections, and engineering blueprints tracing the transition from open sewage disposal to a closed underground network. It's an offbeat stop for anyone interested in urban history beneath the surface.