Private Tour: High Dam and Unfinished Obelisk. Visit an unfinished obelisk and Aswan’s High Dam on a 2-hour private tour, and discover two extraordinary feats of Egyptian engineering separated by 3.5 millennia of history. Take in sweeping views from the top of the modern, 364-foot (111-meter) dam that controls the Nile River’s yearly floods and sends water and power to every corner of Egypt. Gaze into the excavations around an obelisk that would have towered above any known ancient obelisk, then learn how it was carved from solid — but fatally flawed — bedrock. Book and Save 10%: Private Tour: High Dam and Unfinished Obelisk.