Mount Kilimanjaro stands 330 kilometres south of the equator, on the northern boundary of Tanzania. Its location, on an open plain close to the Indian Ocean, and its great size and height strongly influence the climbing conditions. Mount Kilimanjaro is the highest mountain on the African continent. It is composed of three extinct volcanoes: Kibo at 5,895 metres (19,340 feet), Mawenzi at 5,149 metres (16,896 feet), and Shira at 3,962 metres (13,000 feet). It is also one of the world's highest free standing mountains, its bulk looming 4,800 metres above an undulating plain that averages around 1,000 metres above sea level. Its long axis lies in a north-west to south-west line for 60 kilometres and, at its widest part, Kilimanjaro is 40 kilometres across.