Croatia proper comprises several smaller regions of its own: Lika, Gorski Kotar, Međimurje, the Croatian Littoral, Podravina, Posavina, Kordun, Banovina, Prigorje, Turopolje, Moslavina, and Žumberak. The region covers of land and has a population of 2,418,214. Croatia proper straddles the boundary between the Dinaric Alps and the Pannonian Basin. The boundary of these two geomorphological units runs from Žumberak to Banovina, along the Sava River. The Dinaric Alps area is typified by karst topography, while the Pannonian Basin exhibits plains, especially in the river valleys—along the Sava, Drava, and Kupa—interspersed with hills and mountains developed as horst and graben structures. Lika and Gorski Kotar are part of the Dinaric Alps, and contain five out of eight mountains in Croatia higher than . Karst topography predominates in that area, resulting in specific landforms and hydrology because of the interaction of the karst and the region's watercourses—this is exemplified by the Plitvice Lakes. Most of the region has a moderately warm and rainy continental climate, although there is considerable seasonal snow at greater elevations. The region belongs almost exclusively to the Black Sea drainage basin and includes most of the large rivers flowing in Croatia.