It was designated in 1992 to embrace the historic city of Trakai, some 25 kilometers west of Vilnius, and the forests, lakes, and villages in its environs.

Of interest are the Kudrionys forest and the Plomėnų and Varnikai wetlands, where many mammals and bird species find refuge.

Plomėnų swamp has a large colony of waterfowl and many species of protected plants.

Lake Plomėnų [lt] is home to a large colonies of black-headed gulls.

There is a hilltop on the north shore of Galvė lake, opening up great views.