Journal articleWarren's shaft — natural karst or Israelite?A. Faust · 2011 · Levant0Why it matters: Shaft debatePlacesThe place this coversGihon Spring and Warren's Shaft (City of David water system, Jerusalem)🇮🇱 Israel · Jerusalem District, City of David / Ophel, Kidron Valley west slope, Jerusalem Old City south · Hydraulic works