Jerusalem - Hezekiah's Tunnel

Some centuries later King Hezekiah (727-698 B.C.) ordered the construction of another tunnel from the Gihon Spring. 540m/590yds long, 4m/13ft high and 1m/3ft 3in. wide, it ran under the southeastern slopes of Mount Ophel to emerge at the Pool of Siloam. This ensured that the city could still get water even when it was under siege. It is necessary to stoop in some parts of the tunnel where the roof is low.