Jerusalem is located between the Mediterranean and the Dead Sea, 24 kilometers east of the Dead Sea and 56 kilometers west of the Mediterranean, situated in the Judean mountains of the Levant region. Due to its location, Jerusalem does not have abundant water sources and must rely on underground cisterns and reservoirs. Its nearest spring, the Gihon Spring, is in the Kidron Valley on the southwest side of Ophel Hill. Further south, another water source is the En Rogel well, located at the junction of the Kidron Valley and the Valley of Hinnom. The Jebusites carved through the rock, forming a tunnel that channeled water from the Gihon Spring into a large underground cavern. This reservoir was accessed by a vertical shaft, allowing residents to simply lower containers to draw water. Joab was the first to attack Jerusalem through this secret waterway (1 Chronicles 11:6).