The vast forests (Białowieża, Augustów, Knyszyń, Kurpiowska), some of which are the only ones in Europe to have retained their original character, contain a unique wealth of flora and fauna.
De store skove: Bialowieza, Augustów, Knyszyń og Puszcza Kurpiowska, hvoraf nogle er de eneste i Europa, der har bevaret deres oprindelige karakter, har en unik rigdom af flora og fauna.