Гихон
The fortifications consist of two parts: (1) a "fortified passage", and (2) the "Spring Tower". The "fortified passage" extends 30 metres downslope from the MBA city wall, where it once joined the Spring Tower. Its walls are up to 3 metres thick and preserved up to 9 metres high. The massive Spring Tower was built above the Gihon Spring. The passage and tower allowed townspeople to exit the town and go down to the spring within the protection of the fortifications. The excavators believe that the fortified passage could once have ascended to the crest of the hill, possibly to link up with a fortress or citadel there.