A deep well is located within the Keep of Dover castle in a small room (16ft X 8ft) within the wall between the upper landing of the grand staircase and the Banqueting Hall. The well is at least 85m deep, the upper c. 50m is lined with large Caen stone blocks while below this is roughly hewn chalk with clear evidence of tool marks. Evidence of a water circulation system was also located within this well room. This consisted of a series of lead pipes located within the walls of the keep and running from the well room to a mural chamber in the North Eastern wall and to a room below the banqueting hall. (location accurate to the nearest 1m based on available information)