There is an altitude difference between the mountains; the highest point is at 1,280m and the lowest at 380m. The total height difference between the lakes is 135m; Veliki Slap, the largest waterfall, is 70m tall.
The Park was founded in 1949 and was granted UNESCO World Heritage status in 1979. It covers a total area of 300 square kilometres; the lakes join together over a distance of 8 km. It is the oldest national park in Southeast Europe.