We can no longer see what Mount Moriah originally looked like. All that is visible today is its summit inside the Dome of the Rock. However, Charles Warren, the British engineer who explored Jerusalem in the 1860s produced a rock contour map, which has not been surpassed in accuracy to this day. Using this rock map and taking the general configuration of the Jerusalem mountains, with the layered rock sloping from north to south, into consideration, our illustration shows what Mount Moriah would have looked like before the subsequent temples were built. It was near the top of this mountain that Abraham built an altar to sacrifice his son Isaac.