Windsor Hill is a 61.8 hectare biological Site of Special Scientific Interest in Princes Risborough in Buckinghamshire. It lies within the Chilterns Area of Outstanding Natural Beauty, and it is featured in the Nature Conservation Review. A small part is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and access to this area requires a permit.
Kings and Bakers Woods and Heaths is a 212.8 hectare Site of Special Scientific Interest (SSSI) between Heath and Reach in Bedfordshire and Great Brickhill in Buckinghamshire. The site is mainly in Bedfordshire but includes Rammamere Heath in Buckinghamshire. It was notified in 1984 under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authorities are Central Bedfordshire Council and Aylesbury Vale Council. Part of it is a National Nature Reserve, and part of it is a nature reserve managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. it is also a Nature Conservation Review site.
Bacombe and Coombe Hills is a 76.4 hectare biological Site of Special Scientific Interest in Upper Bacombe in Buckinghamshire. Bacombe Hill was formerly owned by Buckinghamshire County Council, which transferred it to Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust in 2014. Coombe Hill is owned by the National Trust.
Bradenham Woods, Park Wood and The Coppice is a 129.1 hectare biological Site of Special Scientific Interest in Bradenham in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and it is described in A Nature Conservation Review. The site is part of the Bradenham Estate, which is owned by the National Trust. It is also designated a Special Area of Conservation. Grim's Ditch, a Scheduled Monument, runs through the site.
Hollowhill and Pullingshill Woods is a 23-hectare biological Site of Special Scientific Interest near Marlow in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty, and the Chilterns Beechwoods Special Area of Conservation. The local planning authorities are Wycombe District Council and Buckinghamshire County Council. Pullingshill Wood is owned by the Woodland Trust, and Hollowhill Wood was formerly owned by Buckinghamshire County Council, but was transferred to the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. Since November 2015 the 7.8-hectare site has been managed by the Trust as "Hog and Hollowhill Woods".
College Lake is a 65 hectare nature reserve in a former chalk quarry in Pitstone in the Aylesbury Vale district of Buckinghamshire. It is one of the flagship reserves of the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and it has an information centre, education facilities, a café, toilets and a shop. It is in the Chilterns Area of Outstanding Natural Beauty. The area east of the lake is a geological Site of Special Scientific Interest called Pitstone Quarry.
Aston Clinton Ragpits is a 2.9 hectare biological Site of Special Scientific Interest in Aston Clinton in Buckinghamshire. It is a former chalk quarry, which is now a nature reserve managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust. It is in the Chilterns Area of Outstanding Natural Beauty.
Dancersend is an 81.3 hectare Site of Special Scientific Interest (SSSI) south of Aston Clinton in Buckinghamshire. Part of the site is managed by the Forestry Commission and part by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust (BBOWT). The BBOWT's 47 hectare nature reserve, called Dancersend with Pavis Woods, extends into fields west of the SSSI. It is in the Chilterns Areas of Outstanding Natural Beauty.
Widdenton Park Wood is a 23.5 hectare Site of Special Scientific Interest west of High Wycombe in Buckinghamshire. It is on the site of a medieval deer park going back to the fourteenth century, and most of it is in the Chilterns Area of Outstanding Natural Beauty.
Brush Hill is a 14.7 hectares Local Nature Reserve east of Princes Risborough in Buckinghamshire. It has been managed since 2013 by the Chiltern Society, and it is part of the Chilterns Area of Outstanding Natural Beauty.
Whiteleaf Hill is an 11 hectares Local Nature Reserve near Princes Risborough in Buckinghamshire. It is owned by Buckinghamshire County Council and managed by the Chiltern Society. it is in the Chilterns Area of Outstanding Natural Beauty, and it has five scheduled ancient monuments, including some dating to the Neolithic and Bronze Ages, and the Whiteleaf Cross, a chalk carving thought to date to the eighteenth century.
Sands Bank is an 11.1 hectares Local Nature Reserve in High Wycombe in Buckinghamshire. It is owned by West Wycombe Estates and managed by Wycombe District Council.
Prestwood Local Nature Reserve or Prestwood is a 2.1 hectares Local Nature Reserve in Prestwood in Buckinghamshire. It is in the Chilterns Area of Outstanding Natural Beauty. The site is owned by Wycombe District Council and leased to the Chiltern Society.
Aston Rowant Woods is a 209.7 hectare biological Site of Special Scientific Interest near Aston Rowant in Oxfordshire and Buckinghamshire. Part of it is in Aston Rowant National Nature Reserve, and a large part is in the Chiltern Beechwoods Special Area of Conservation. The site is also in the Chilterns Area of Outstanding Natural Beauty.
Gomm's Wood is an 18.1 hectares Local Nature Reserve in High Wycombe in Buckinghamshire. It is owned and managed by Wycombe District Council.
