Yet another fascinating historical attraction in Jerusalem, Hezekiah's Tunnel is an absolute must-see for those who like to combine their sightseeing with a real sense of discovery and adventure. The tunnel, which is about 2,700 years old, was built by Hezekiah in preparation for an attack by the invading Assyrians - he thought by shutting down the springs outside the city and redirecting the water under the city walls through a tunnel, he could protect Jerusalem's precious water supply and so outlast the invaders. The incredible feat - the tunnel is 1,640 feet (500m) long, and carved out of solid rock - is made all the more remarkable when one learns that its middle section, which zig-zags wildly, was constructed in this way because the two teams of diggers (each operating from a different end of the tunnel) were trying to locate each other by the sound of the other's picks working against the rock. One of the very few 8th-century BC tourist attractions you can actually explore, Hezekiah's Tunnel is a wonderful place to pass a couple of hours, wandering through the bowels of Jerusalem's Old City. It is a particularly popular activity for kids, although it may not be suitable for the highly claustrophobic.
Address: Hashiloah Road