Brighton to Newhaven Cliffs is a 165.4-hectare (409-acre) biological and geological Site of Special Scientific Interest and Geological Conservation Review site, which stretches along the coast between Brighton and Newhaven in East Sussex. An area of 16.4 hectares is the Castle Hill, Newhaven Local Nature Reserve

Newhaven is a port town in the Lewes district of East Sussex, England, lying at the mouth of the River Ouse.