The village is located between Olpe and Attendorn on the L 512 directly on the Biggetal dam. Thanks to the railroad station directly on the lake with the home port of the "White Fleet" of the Biggesee passenger boat company, Sondern has the only lake station in North Rhine-Westphalia. The beautiful circular route around the Biggesee - whether on foot, by bike or on inline skates - offers pure relaxation.