From the terrace of the Old Cataract, you can see what looks like a single isolated Fatimid tomb high up on the opposite bank. This, in fact, is the final resting place of the 48th leader of the Ismailies, Muhamed Shah Aga Khan III, and his French wife, Begum Aga Khan. He predeceased her by a considerable margin, dying in 1957. She kept a lonely vigil, placing a red rose on his sarcophagus every day until her death in 2000. Though it's a long walk up and the mausoleum itself was closed to visitors at the time of writing, the view from the top is stunning.