biebrza river plain wetlands and nature reserve along dluga luka, long gap, sightseeing path in podlasie in poland

air attraction bagna biebrza biebrzanski bird birding bush channel conservation country countryside ditch dluga drainage educational edukacyjna europe flood forest grass horizon irrigation landmark landscape luka marsh moor narodowy national nature open outdoor panorama panoramic park path pattern podlasie podlaskie poland pond protection reed reserve rezerwat river sciezka sightseeing spring swamp tourism touristic travel tree trekking valley viewpoint village warmia water wetland wildlife wood