The Attersee is with a length of 20 km and a maximum width of 3.3 km, the largest lake in the Salzkammergut. It reaches a depth of 171 m. Precisely for this reason and also because of the very steep bank, he is also considered extremely popular lake among divers.
Once a year, usually in mid-September, a car-free biking experience day is held where a 48 km route is locked around the lake for car traffic.