Grundlsee is located at 709 meters above sea level and is the largest of Styria's lake, hence the nickname "Styrian Sea". The 14-kilometer long bathing beach is largely freely accessible and there are 3 sections that feature facilities for guests. One section is reserved for nudist bathing. Activities: boat cruises (Grundlsee, Toplitzsee, Kammersee), boat rental, sailing & windsurfing school, yacht club, fishing, scuba diving. In the summer Grundlsee has a water temperature of around 25 Celsius. Water quality: class A.