We visited The Unfinished Obelisk, Aswan early in the day on route to see the High Dam. It was somewhat misty and cold. However the steep climb was rewarding to see the sight. It was an insight into how the ancient Egyptians cut into the hard rock and split it precisely. The original bore holes are clearly seen.
The armed guards were highly visible from their high mini fortress.
Do take your time and watch your step.