The Site is in the south-west of Poland, along the border with the Czech Republic in the Karkonosze Mountains. A major part of the wetland, covering about 250 hectares, is situated in the Czech Republic, and in 2009 the Site was designated as a Transboundary Ramsar Site together with the Czech Krkonošská rašeliniště (Ramsar Site no.637). On the Polish side lies a complex of eight separate peat bog areas with vegetation typical of subarctic tundra, combining arctic and alpine species. Their combined surface area is about 40 ha. The Site lies on the watershed between the Baltic and North Sea basins, giving it importance in groundwater recharge and flood control. The surfaces of the bogs feature hummocks, oblong ridges, trough-like hollows which gather water, and permanent pools. Unique and rare algae, for instance Corcontochrysis noctivaga, thrive in the pools. The Site provides breeding refuge to protected and endangered bird species, such as the bluethroat and the nationally endangered Eurasian black grouse. The major threats to the bogs are trampling, littering and water pollution from tourism and recreational activities. Since 1992 the Site has been part of a Bilateral Biosphere Reserve under the UNESCO Man and the Biosphere programme.