Spreetunnel Friedrichshagen
The Spreetunnel Friedrichshagen is a heritage-protected pedestrian passage running 120 meters beneath the River Spree. Built with pneumatic caissons, it was Germany’s first ferro-concrete tunnel constructed using this method, marking a milestone in early 20th-century engineering.
Engineering with air and concrete
Pneumatic caissons allowed workers to build sections of the tunnel under air pressure, stabilizing the riverbed while concrete was set in place. This approach made it possible to create a durable, watertight structure at a time when tunneling beneath waterways was still a complex challenge. The result is a solid, curved corridor that has served generations of pedestrians and cyclists.
Riverside access and sandy shores
From the south entrance, the tunnel leads toward two nearby beaches along the Spree. Paths fan out to sandy banks and shady stretches of riverside, where the water and trees shape a calm, open landscape. The tunnel’s north–south link makes it a practical route between neighborhoods and a direct way to reach the waterfront.
