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.
Selborne Common is a 99.6-hectare (246-acre) biological Site of Special Scientific Interest west of Selborne in Hampshire. It is a Nature Conservation Review site, Grade I, and is part of the East Hampshire Hangers Special Area of Conservation. It is managed by the National Trust.
Kingley Vale is a 204.4-hectare (505-acre) biological Site of Special Scientific Interest north of Chichester in West Sussex. It is also a Special Area of Conservation and a Nature Conservation Review site, Grade I. An area of 147.9 hectares is a national nature reserve.
Pewsey Downs is a 305.3 hectare biological Site of Special Scientific Interest on the southern edge of the Marlborough Downs north of Pewsey in Wiltshire, notified in 1951. It includes the Pewsey Downs National Nature Reserve.
Queendown Warren is a 22.2-hectare (55-acre) biological Site of Special Scientific Interest south-east of Rainham in Kent. It is a Local Nature Reserve, a Nature Conservation Review site, Grade 2, and a Special Area of Conservation. It is in the Kent Downs Area of Outstanding Natural Beauty. It is managed by the Kent Wildlife Trust, and part of it is owned by Plantlife.
Westfield Wood is a 5-hectare (12-acre) nature reserve north of Maidstone in Kent, which is managed by the Kent Wildlife Trust. It is part of the Wouldham to Detling Escarpment Site of Special Scientific Interest and Nature Conservation Review site, Grade I. It is also in the North Downs Woodlands Special Area of Conservation and the Kent Downs Area of Outstanding Natural Beauty.
Burham Down is a 110-hectare (270-acre) nature reserve between Maidstone and Chatham in Kent. It is managed by the Kent Wildlife Trust. It is part of the Wouldham to Detling Escarpment Site of Special Scientific Interest and Nature Conservation Review site, Grade I, the Kent Downs Area of Outstanding Natural Beauty, and the North Downs Woodlands Special Area of Conservation.
Wye and Crundale Downs is a 358.3-hectare (885-acre) biological and geological Site of Special Scientific Interest in a number of separate areas east of Ashford in Kent. It is a Special Area of Conservation and a Nature Conservation Review site, Grade I. and it is part of Kent Downs Area of Outstanding Natural Beauty. Some areas are part of a National Nature Reserve, and another area is listed on the Geological Conservation Review.
Folkestone to Etchinghill Escarpment is a 263.2-hectare (650-acre) biological and geological Site of Special Scientific Interest on the northern outskirts of Folkestone in Kent. It is a Special Area of Conservation. An area of 205 hectares is a Nature Conservation Review grassland site, Grade 2, and the 70-hectare (170-acre) Asholt Wood at its western end is a Grade 1 woodland site. The reserve has a Geological Conservation Review site.
Mole Gap to Reigate Escarpment is a 1,016.4-hectare (2,512-acre) biological and geological Site of Special Scientific Interest west of Reigate in Surrey. It is a Geological Conservation Review site and a Special Area of Conservation. Part of it is a Nature Conservation Review site, Grade I. Two small private nature reserves in the site are managed by the Surrey Wildlife Trust, Dawcombe and Fraser Down.
Winterbourne Chalk Pit is a 0.05-hectare (0.12-acre) geological Site of Special Scientific Interest west of Winterbourne in Berkshire. It is a Geological Conservation Review site. It is located within the North Wessex Downs.
Halling to Trottiscliffe Escarpment is a 600.6-hectare (1,484-acre) biological Site of Special Scientific Interest which runs from Cuxton to Wrotham, west of Rochester in Kent. It is a Nature Conservation Review site, Grade I. and a Special Area of Conservation.
Wouldham to Detling Escarpment is a 311.2-hectare (769-acre) biological and geological Site of Special Scientific Interest which stretches from Wouldham to Detling, north of Maidstone in Kent. Part of it is a Geological Conservation Review site, and it is part of the North Downs Woodlands Special Area of Conservation and the Kent Downs Area of Outstanding Natural Beauty. It is a Nature Conservation Review site, Grade I and it includes three Kent Wildlife Trust nature reserves and a Local Nature Reserve,
The Larches is a 25-hectare (62-acre) nature reserve north of Detling, which is north of Maidstone in Kent. It is managed by Kent Wildlife Trust. It is part of the Wouldham to Detling Escarpment Site of Special Scientific Interest and Nature Conservation Review site, Grade I It is also part of the North Downs Woodlands Special Area of Conservation, and Kent Downs Area of Outstanding Natural Beauty,
Harting Downs is a 336.3-hectare (831-acre) biological Site of Special Scientific Interest west of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade I and an area of 206.6 hectares is a Local Nature Reserve which is owned and managed by the National Trust.
Aston Upthorpe Downs is a 38.5-hectare (95-acre) biological Site of Special Scientific Interest south of Aston Upthorpe in Oxfordshire. It is a Nature Conservation Review site, Grade I.
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.
Porton Down SSSI is a 1,559-hectare (3,850-acre) biological Site of Special Scientific Interest which spans the border between Hampshire and Wiltshire in England. It is adjacent to Porton Down science park near Porton, and much of it is Ministry of Defence property which is closed to the public. It is a Nature Conservation Review site, Grade I, a Special Area of Conservation and a Special Protection Area.
Stockbridge Down is a 69.8-hectare (172-acre) biological Site of Special Scientific Interest east of Stockbridge in Hampshire. It is a Nature Conservation Review site, Grade 2. It is owned by the National Trust and part of it is a Scheduled Monument, with an Iron Age hillfort and fourteen Bronze Age burial mounds.
