Sava Hills
The Sava Hills () are the eastern part of the Slovene Prealps. They are oriented in the east-west direction and are located to the north and south of the Sava River in central and eastern Slovenia, among the Ljubljana Basin to the west, the Celje Basin to the north, the Lower Carniola valley system and the Krško Basin to the south, and the Sotla Hills to the east. They cover an area of and are the largest Slovenian mesoregion. The region has an average elevation of only , and an average inclination of 16.6°. It is water-rich, because the ground contains copious impermeable rocks, particularly sandstone and conglomerate at lower elevations, whereas at higher elevations, it mainly consists of limestone and dolomite. Predominantly deciduous forest covers almost two thirds of the area. The Sava flows through its central part from the west to the east. Notable rises along it are Kum () to the south of the Sava, Mount Čemšenik (), Javor (), and Mrzlica () to the north of the Sava and to the west of the Savinja River, and Bohor () and Lisca () to the north of the Sava and the east of the Savinja. The Savinja