The Biebrza National Park is the largest, longest, and wildest national park in Poland. The heart of this park, famous for its marshes and wetlands, is the 160-kilometer-long Biebrza River, also known as the Polish Amazon. The characteristic feature of this pristine river is its annual flooding, which creates new meanders and floodplains, transforming vast meadows into lakes.
The Biebrza Valley has largely retained its natural character, and its wild and inaccessible areas make it a mysterious place, rich in flora and fauna.