Lake stretches in the area of 1332 hectares, it is unique in a hydrographic perspective: it consists of several branches. Therefore, no other Lithuanian lakes can catch up with Sartai on the abundance of branches. This lake has the longest coastline (79 km) and is the fifth-largest lake in Lithuania.  It has 6 islands. In Dusetos, on the shores of this lake, an attractive space for recreation and admiration of beautiful landscapes is created: shelters, paths, swings, information stands, bridge, wharf, sculpture park are set up there.