Hezekiah’s Tunnel

Hezekiah's Tunnel was a water tunnel built to bring water from the Gihon Spring to a reservoir near the place later known as the Pool of Siloam. King Hezekiah had it built to help protect the city's water supply before the Assyrian army attacked (2 Kings 20:20; 2 Chronicles 32:2–4).

See also Pool of Siloam.