Lee-on-The Solent to Itchen Estuary is a 585.9-hectare (1,448-acre) biological and geological Site of Special Scientific Interest which stretches along the coast between Southampton and Gosport in Hampshire. It is a Geological Conservation Review site. It is part of Solent and Southampton Water Ramsar site and Special Protection Area, and of Solent Maritime Special Area of Conservation. Three areas are Local Nature Reserves, Chessel Bay, Hook with Warsash and Mercury Marshes. One area is Hamble Common, a Scheduled Monument and public common.