The Au Peninsula is located on the Swiss Zürichsee lake shore in the municipality of Au, Canton of Zürich.GeographyAu is a peninsula situated on the southwestern Zürichsee lake shore on the slope of the Zimmerberg plateau. In its south, between the headland and the peninsula, a small lake respectively a reed landscape to the north is situated. The area is located in the municipality of Au between Wädenswil and Horgen.