Warren's Shaft

Warren's Shaft is a vertical shaft next to the Gihon Spring, the main source of water of Bronze and Iron Age Jerusalem, discovered in 1867 by British engineer and archaeologist, Sir Charles Warren. The term is currently used in either a narrower, or a wider sense:

In the narrower, initial sense, Warren's Shaft is the almost vertical natural shaft leading down to a pool fed by the Gihon Spring.

In the wider sense, as the Warren's Shaft system, it is the Bronze Age water system allowing protected access from the city to the Gihon Spring.After the 19th-century discovery of the vertical natural shaft, it was thought to have been the centrepiece of the city's early water supply system, since it would have enabled the city's…

Source: Wikipedia