Ruxley Gravel Pits is an 18.7-hectare (46-acre) biological Site of Special Scientific Interest in Ruxley, Orpington, in the London Borough of Bromley, and originally dug between 1929 and 1951. It is also a Site of Metropolitan Importance for Nature Conservation. It is owned by the Environment Agency and managed by Kent Wildlife Trust. Natural England has assessed its condition as "unfavourable recovering".