The highlands are known for their natural environment, with tourist destinations such as Nyanga, Troutbeck, Chimanimani, Vumba and Chirinda Forest at Mount Selinda. About 20% of the country consists of low-lying areas, (the low veld) under 900m. Victoria Falls, one of the world's biggest and most spectacular waterfalls, is located in the country's extreme northwest and is part of the Zambezi river.