Much of the PLA's territory is made from sandstone mountain ranges. More than half of the area is covered by forests. Beech and fir trees grow in the area, along with strong presence of the spruce monoculture. Exceptions are the areas under Babia hora, Paráč and Pilsko mountains, with old growth spruce with rowan trees being represented. A specific phenomenon of the park are the peat bogs, represented by the pine woods, providing shelter for many threatened species. The Orava Dam is a nesting place for many rare species of birds. The highest mountain is Babia hora at the border with Poland at