Poscensko Jezero is one of the lakes on Jezerska Povrs (Plateau of Lakes). It is closest to the edge of Durmitor. Poscensko Jezero (1487 m, 3.6 m deep) is one of 18 mountain lakes of Durmitor National Park. Durmitorians called them “Gorske oci” (Mountain Eyes). After glaciation in last ice age, during melt of ice, Durmitor’s lakes was born.