Wikipedia
Osowiec-Twierdza
Osowiec-Twierdza is a village in the administrative district of Gmina Goniądz, in Mońki County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately south of Goniądz, north-west of Mońki, and north-west of the regional capital Białystok. Osowiec-Twierdza is home to the Biebrza National Park.