The Swanscombe site is a 3.9-hectare (9.6-acre) geological Site of Special Scientific Interest in Swanscombe, north-west Kent, England. It contains two Geological Conservation Review sites and a National Nature Reserve. The park lies in a former gravel quarry, Barnfield Pit, which is the most important site in the Swanscombe complex, alongside several other nearby pits. It dates to the Hoxnian interglacial, around 425-375,000 years ago. It is best known for the fragmentary remains of the skull of an archaic human dubbed "Swanscombe Man", likely an early Neanderthal or Homo heidelbergensis. Numerous stone artifacts, including handaxes, have also been recovered from the quarry.