Biržai Forest
The Biržai Forest is a primaeval forest in Biržai District Municipality, Lithuania. With the area of 16,770 hectares, it is the tenth largest forest in terms of area in Lithuania. It is managed, with some other smaller forests, by the  (Biržų miškų urėdija). See also
Biržai Regional Park

References

Forests of Lithuania
Biržai District Municipality
Old-growth forests