Cooling Castle is a 14th-century quadrangular castle in the village of Cooling, Kent on the Hoo Peninsula about 6 miles north of Rochester. It was built in the 1380s by the Cobham family, the local lords of the manor, to guard the area against French raids into the Thames Estuary. The castle has an unusual layout, comprising two walled wards of unequal size next to each other, surrounded by moats and ditches.