Gihon Spring

The single most important geographical feature in Jerusalem's history, explaining why the city was founded on this specific ridge and providing the starting point for multiple water engineering systems spanning two millennia.

The Gihon Spring is the reason Jerusalem exists where it does. The spring emerges from a natural cave at the base of the eastern slope of the narrow ridge now called the City of David, above the Kidron Valley. It is the only major freshwater source in the immediate vicinity of Jerusalem, and its presence determined where the original settlement was founded thousands of years before David captured the city.

The spring is a karst spring, meaning it flows through natural channels dissolved in the limestone bedrock. It is intermittent, flowing in surges rather than continuously. The Hebrew name "Gihon" comes from the root meaning "to gush" or "to burst forth," which accurately describes its behavior. The spring produces water in pulses, flowing strongly for a period and then subsiding before flowing again. In antiquity, this pulsing behavior was sometimes interpreted as a sign of divine activity.

The earliest inhabitants of the site recognized the spring's value and built fortifications to protect it. Excavations by Ronny Reich and Eli Shukron, which began in 1995 and continued for many years, uncovered a massive Middle Bronze Age tower and pool complex at the spring's outlet. The tower is among the largest Bronze Age structures ever found in the region, with walls several meters thick. This enormous investment in fortification at the spring shows that protecting the water supply was the city's highest priority even in the second millennium BCE.

The spring was harnessed by multiple water systems over the centuries. The earliest channels directed water along the slope to irrigate agricultural terraces in the Kidron Valley. During the Middle Bronze and Late Bronze Ages, a tunnel and shaft system was developed that allowed inhabitants on the ridge above to access the spring water from inside the city walls. This system has been connected by some scholars to the "water shaft" mentioned in 2 Samuel 5:8 in connection with David's capture of the city, though the identification is debated.

The most famous engineering project connected to the spring is Hezekiah's Tunnel, built around 701 BCE to redirect the spring's water through 533 meters of rock to the Pool of Siloam inside the city walls. Second Kings 20:20 and 2 Chronicles 32:30 describe this project. By channeling the water underground to a pool within the fortified perimeter, Hezekiah denied the water to the besieging Assyrian army while securing it for the city's defenders.

First Kings 1:33 and 1:38 place Solomon's anointing as king at the Gihon Spring. David instructed Zadok the priest and Nathan the prophet: "Take with you the servants of your lord and have Solomon my son ride on my own mule, and bring him down to Gihon. And let Zadok the priest and Nathan the prophet there anoint him king over Israel." The choice of the Gihon for this ceremony was not accidental. The spring was the most sacred water source in Jerusalem and a natural gathering point outside the city walls.

Second Chronicles 33:14 records that Manasseh "built an outer wall to the City of David west of Gihon, in the valley," indicating continued awareness of the spring as a landmark.

The spring still flows today. Visitors to the City of David can enter the spring cave and walk through Hezekiah's Tunnel, wading through the water that still pulses from the same geological source that attracted the first settlers to this ridge perhaps five thousand years ago.

• Massive Middle Bronze Age tower at the spring outlet, among the largest Bronze Age defensive structures in the region
• Multiple water systems spanning the Middle Bronze Age through the Iron Age, showing continuous engineering investment
• The spring is a karst (intermittent) source, pulsing in surges, consistent with the Hebrew name meaning "to gush"
• Starting point of Hezekiah's Tunnel (533 m), which redirected water to the Pool of Siloam inside the city
• Pool complex and channel systems dating to various periods, representing the most extensive urban water infrastructure in the ancient Near East
• Still-active spring providing the same water source that determined Jerusalem's location thousands of years ago

The Gihon Spring appears at several pivotal moments in biblical history. First Kings 1:33-45 places Solomon's anointing at the Gihon, a ceremony that established the Davidic succession at the city's most important natural feature. The account describes the rejoicing being so great that "the earth was split by their noise." Second Chronicles 32:30 records Hezekiah's engineering project: "This same Hezekiah closed the upper outlet of the waters of Gihon and directed them down to the west side of the city of David." Second Kings 20:20 confirms: "The rest of the deeds of Hezekiah, and all his might, and how he made the pool and the conduit and brought water into the city." These verses directly describe the tunnel that begins at the Gihon and ends at the Pool of Siloam. Second Samuel 5:8 mentions a "water shaft" in connection with David's capture of Jerusalem from the Jebusites. Some scholars have connected this reference to the shaft and tunnel system at the Gihon, suggesting that Joab entered the city through the water system. This identification is debated, but the presence of a pre-Davidic water system at the Gihon is well established archaeologically.