After passing through Umm Sahyun Gate and looking towards the west, you will encounter one of the Nabataean quarries, commonly known as Najr Quarry. It is situated approximately 200 meters west of the main road and faces south. The top of the quarry spans about one thousand square meters, where one can still observe the un extracted blocks and their trenches. The front of the quarry measures about 120 meters in length and 28 meters in height, boasting high-quality stone that was likely utilized in the construction of major buildings. Within many quarries, pairs of slots or footholds (resembling ladders) are often visible. These features, designed to aid Workers descending and ascending to the quarrying area, are prominently found at Al-Najr Quarry. Geologically, most of the quarries in Petra, including Al-Najr quarry, are situated within the upper layers of the Umm Ishrin sandstone formation, also known as honeycomb sandstone. This sandstone is characterized by its white and mauve-red color, coarse to medium grain size, and was commonly used by the ancient inhabitants of Petra for constructing their buildings. It is likely that a significant amount of fine sand was piled in front of the quarries to facilitate the safe dropping of extracted blocks from the quarry's top without causing damage. The sand extracted from the quarry was dumped in the lower southwestern area of it, later used as a graveyard for the inhabitants of Petra.