It is the largest lake in the Wigry National Park, of 2,187 ha of area and up to 73 m in depth and very winding and long (about 72 km) shoreline. It occupies the central part of the Park. Water tourism and angling is allowed here. The name Wigry is derived from the Lithuanian vingris – winding, sinuous and describes perfectly the outline of the lake. The present Wigry lake consists a part of the old lake complex called Prawigry (Old Wigry) which once included several adjacent bodies of water which are now separate lakes (Długie, Muliczne, Okrągłe, Leszczewek). The Wigry lake has several parts called plosa, which differ in such properties as size, depth, number of islets, nature of the coastline and level of nutrients (called “trophic status” in ecology). There are 28 species of fish. Most of the coast line has retained its primeval character. Its habitats and vast reeds are inhabited or visited by some 140 species of birds, out of which 30 are species associated with inland water and marsh habitats. The Wigry lake is accessible for tourism from the beginning of June to the end of October. The park’s water is “the silent zone”, that’s mean it’s forbidden to use engine driven. Anglers and people likes water sports are nice to see. There are public beaches and renting water equipment points in Stary Folwark and Gawrych-Ruda. The ferry, which has a harbour in Wigry, on a side of monastery, goes around Wigry lake.