In Second Temple times at the southern end of the City of David, a thick wall separated the Kidron Valley on the east from the Tyropoean Valley on the west. The wall served for defense and also as a dam, creating a rich agricultural area behind it to the northwest. In the view (top) of the southern tip of the City of David looking to the north, the Kidron Valley is identified by the curving road. The rocky scarp (center left) leads to the Tyropoean Valley. The dam was located approximately along the lower portion of the road from the level of the cars. The square of dark trees enclosed within a low wall (lower left) marks the location of the pool created by the dam.