The largest of Poland’s 23 National Parks, the Biebrza National Park was created on September 9, 1993. Its total area is 592.23 km2 (228.66 sq mi), of which forests cover 155.47 km², fields and meadows covering 181.82 km² and marshes with an area of 254.94 km².
The Biebrza Marshes are the most precious part of the park. 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 and other animals. 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.