The terrain consists largely of arid and semi-arid rangelands, with several low mountain ranges. The most important (but not tallest) is the Mount Lofty-Flinders Ranges system, which extends north about from Cape Jervis to the northern end of Lake Torrens. The highest point in the state is not in those ranges; Mount Woodroffe () is in the Musgrave Ranges in the extreme northwest of the state. The south-western portion of the state consists of the sparsely inhabited Nullarbor Plain, fronted by the cliffs of the Great Australian Bight. Features of the coast include Spencer Gulf and the Eyre and Yorke Peninsulas that surround it.