Biebrza National Park protects vast and relatively untouched fenlands with a unique variety of several communities of plants, rare wetland birds, and mammals such as elk and beaver.

The Biebrza wetlands as well as the Narew River valleys are very important centres for birds’ nesting, feeding and resting.

In 1995 the park was designated as a wetland site of worldwide significance and is under the protection of the Ramsar Convention.

The most important part of the park is Red Marsh (Polish: Rezerwat przyrody Czerwone Bagno), which is under strict protection.

8 in the village of Osowiec-Twierdza, within the grounds of the historic Osowiec Fortress from the 19th century, near Goniądz.