Grain Tower Battery is a mid-19th-century gun tower situated offshore standing in the mouth of the River Medway by Grain. Construction is similar to the many early 19th century Martello towers and is the last-built example of a gun tower of this type. Built in the 1850’s to protect the Medway ports from Naval attack, updated for WW1 and again for WW2, finally be decommissioned in 1956 after a century of service. The building is listed as part of our heritage, but sits partially abandoned on the flats of the estuary with access available at low tide over an old causeway. 
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