Lesotho's rugged terrain and its mountain ranges have always protected it against invasion. No part of Lesotho is below 1 400m (3 280ft) above sea level. In other words, it is the only country in the world with all its territory above 1 400 metres. In still other words, it has the highest low point of any nation on earth. Due to this, Lesotho is often referred to as The Kingdom in the Sky, The Roof of Africa, or The Switzerland of Africa. At 3 482m, Thabana-Ntlenyana ("Beautiful Little Mountain"), in Lesotho's Maluti Mountain Range, is the highest peak in Southern Africa.