Site of Special Scientific Interest

A Site of Special Scientific Interest (SSSI) is a type of legal conservation given to an area in the United Kingdom. They are sites of biological or geological interest, or both.
Any activity which might affect an SSSI is illegal unless the appropriate planning body gives permission. Owners of land must do what needs to be done to protect an SSSI which sits on their land. There may be grants available to help owners look after the site.