The Rwenzori mountains. The geographer Ptolemy called them the Mountains of the Moon, in the 2nd century AD, and thought they were the source of the Nile. The massive range between Uganda, Rwanda and the Congo is perpetually shrouded in mist and looms like a dark and mysterious presence over the Rift Valley.
Its two peaks above 5,000m are covered in snow and ice and on the rare occasions when they are revealed through a gap in the clouds, they emanate a harsh, silvery light.
