Schlachtensee is the most southerly in the Grunewald chain of lakes, which belongs geologically to the
Teltow plateau, and was emerged some 15,000 years ago from the ice age as a glacial trough. With a surface area of around , a circumference of and a maximum depth of , it is one of the larger lakes in Berlin. The lake is popularly used for walking and for swimming, due to the good quality of the water. The Paul-Ernst Park is located next to the
S-Bahnhof Schlachtensee. The park is named for the writer,
Paul Ernst (1866–1933), and contains a memorial stone. It is open to the public and runs down the slope to the lake and half a kilometer around the southern shore. At the end of the park is a large wooded area, while the area over the S-Bahn station is landscaped into lawns. Since 2020, the lake is part of a new quarter of the same name. ==References==