Grain Tower Battery-4Grain Tower Battery is located in the middle of the Medway estuary on Grain Spit, a sandbank that is exposed at low tide. It was built in 1866 as part of the Chatham defences to a design similar to that used for the Martello Towers, being almost circular in shape and with the gun platform on the roof. A chain linked the tower to Sheerness to stop vessels entering the Medway. You can still see the chain wrapped around the base of the tower. It was modified in 1910 when the accommodation block was added in brick to the west side.
