Wikipedia
Schwielowsee is a municipality in the Potsdam-Mittelmark district, in Brandenburg, Germany. It is situated on the shore of the Schwielowsee lake, through which the River Havel flows. The municipality was founded on December 31, 2002 in merger of the three villages Caputh, Geltow and Ferch. The Caputh Ferry, a cable ferry across the Havel, links Caputh and Geltow. In the east Schwielowsee shares border with the City of Potsdam, in the west with the town of Werder (Havel).
Schwielowsee is a lake in the state of Brandenburg, Germany. It is situated to the south and west of the city of Potsdam. The villages of Caputh, Ferch and Geltow, on the banks of the lake, form the municipality of Schwielowsee.
The lake is some long, with a maximum width of and a surface area is . It lies at an elevation of above sea level, and has a maximum depth of .
The navigable River Havel flows through the eastern end of the lake, entering it at Caputh via a short channel from the Templiner See, and exiting to the north. The lake is also navigable to its south-western end at Ferch. Navigation is administered as part of the Untere Havel–Wasserstraße.