Whitehorse Hill is a hill in the Berkshire Downs in Oxfordshire, England, west of Wantage. At 261 metres (856 ft), it is the highest point in Oxfordshire. Uffington Castle lies on the summit of the hill, and the Uffington White Horse is on the hill's northern slope. The hill and an adjacent area below, including Dragon Hill and The Manger, make up a 98.9-hectare (244-acre) biological and geological Site of Special Scientific Interest.
Stratford Toney Down is a 23.1 hectare biological Site of Special Scientific Interest in Wiltshire, England, which was notified in 1987. The site lies in a shallow dry valled in the south of Stratford Tony parish, about 5 miles (7.5 km) south-west of Salisbury. It is important for the botanically rich chalk grassland – mainly sheep's fescue and meadow oat-grass – which supports several nationally rare plant and butterfly species.
Quarry Hangers is a 28.5-hectare (70-acre) biological Site of Special Scientific Interest south-west of Caterham in Surrey. An area of 11 hectares is a nature reserve managed by the Surrey Wildlife Trust.
Sheepleas is a 99.9-hectare (247-acre) biological and geological Site of Special Scientific Interest east of Guildford in Surrey. It is a Geological Conservation Review site and a Local Nature Reserve. It is owned by Surrey County Council and managed by the Surrey Wildlife Trust.
Woldingham and Oxted Downs is a 128.4-hectare (317-acre) biological Site of Special Scientific Interest east of Caterham in Surrey.
Glyme Valley is a 28.9-hectare (71-acre) biological Site of Special Scientific Interest east of Chipping Norton in Oxfordshire. An area of 3 hectares is a nature reserve managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust
Croxley Common Moor is a 39.5-hectare (98-acre) biological Site of Special Scientific Interest (SSSI) and Local Nature Reserve in Croxley Green, Hertfordshire. It is owned by Three Rivers District Council and managed by the council together with the Countryside Management Service and the Friends of Croxley Common Moor. Most of it is a registered common.
Wormsley Chalk Banks are six separate areas which together are a 14.1-hectare (35-acre) biological Site of Special Scientific Interest near Turville in Buckinghamshire and Oxfordshire. The site is in the Chilterns Area of Outstanding Natural Beauty.
Temple Island Meadows is a 14.1-hectare (35-acre) biological Site of Special Scientific Interest on the Buckinghamshire bank of the River Thames. It is north of Henley-on-Thames and opposite Temple Island, an island in the Thames.
St Leonard's Park Ponds is a 3.9-hectare (9.6-acre) biological Site of Special Scientific Interest east of Horsham in West Sussex.
Rushy Meadows is an 8.9-hectare (22-acre) biological Site of Special Scientific Interest on the western outskirts of Kidlington in Oxfordshire.
Shipton-on-Cherwell and Whitehill Farm Quarries is a 30-hectare (74-acre) geological Site of Special Scientific Interest north of Kidlington in Oxfordshire. It is a Geological Conservation Review site.
Weston Fen is a 14-hectare (35-acre) biological Site of Special Scientific Interest north of Weston-on-the-Green in Oxfordshire.
Hook Meadow and The Trap Grounds is a 11.9-hectare (29-acre) biological Site of Special Scientific Interest on the northern outskirts of Oxford in Oxfordshire.
Hook Norton Cutting and Banks is a 6.7-hectare (17-acre) biological and geological Site of Special Scientific Interest south of Hook Norton in Oxfordshire. The site is in three areas, two of which are managed as a nature reserve called Hook Norton Cutting by Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. and are designated a Geological Conservation Review site.
Pixey and Yarnton Meads is an 86.4-hectare (213-acre) biological Site of Special Scientific Interest north of Oxford in Oxfordshire. It is a Nature Conservation Review site, Grade I, and part of Oxford Meadows Special Area of Conservation.
Danebury Hill is a 13.7-hectare (34-acre) biological Site of Special Scientific Interest north-east of Nether Wallop in Hampshire. It is part of Danebury Hillfort Local Nature Reserve.
Martin and Tidpit Downs is a 367.5-hectare (908-acre) biological Site of Special Scientific Interest north-west of Fordingbridge in Hampshire. Martin Down is a 341-hectare (840-acre) national nature reserve and an area of 115 hectares is a Nature Conservation Review site, Grade I. Bokerley Dyke, a prehistoric linear earthwork and scheduled monument, runs through the site.
Norley Copse and Meadow is a 7.5-hectare (19-acre) biological Site of Special Scientific Interest east of Lymington in Hampshire. It is part of New Forest Ramsar site and Special Protection Area.
