This park was set up to protect the landscape and cultural environment of the Haanja highland. At the central part of the park are the two highest hills in the Baltic States – Suur Munamägi, which stands 318 m above sea level, and Vällamägi, which is 304 m above sea level. The ancient Rõuge River valley (Rõuge ürgorg) is found in the western part of the park. It is 7.5 km long and up to 60 m deep. The valley dates back to the Ice Age, and it has seven lakes, including the deepest one (38 m) in Estonia – Lake Rõuge Suurjärv.