Fleam Dyke is a linear earthwork between Fulbourn and Balsham in Cambridgeshire. It is now a Scheduled Monument and a 7.8 hectare biological Site of Special Scientific Interest. It formed a boundary of the late Anglo-Saxon, pre-Norman administrative division of Flendish Hundred.
Hardwick Wood is a 15.5 hectare biological Site of Special Scientific Interest southwest of Hardwick in Cambridgeshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Kings Wood and Glebe Meadows is a 36.1 hectare Site of Special Scientific Interest in Houghton Conquest in Bedfordshire. A local teenage boy, Peter Sollars, discovered many rich communities of plants there, including a number of rare species, e.g. Butcher's Broom, Small Teasel and Green Hellebore in the wood, and combinations of Lady's Bedstraw, Spiny Restharrow, Great Burnet, Adders Tongue Fern and Cowslips in the meadows. The County Botanist at the time, John Dony, was notified of his findings, and confirmed by a site visit with Peter. The site was notified in 1984 under the Wildlife and Countryside Act 1981, and the planning authority is Central Bedfordshire. It is also a Local Nature Reserve.
Ashdon Meadows is a 1.5 hectare biological Site of Special Scientific Interest south of Ashdon in Essex.
Hales and Shadwell Woods is a 15.4 hectare biological Site of Special Scientific Interest north-east of Saffron Walden in Essex. Shadwell Wood has an area of 7.1 hectares and it is managed by the Essex Wildlife Trust. Hales Wood is a National Nature Reserve, and it is listed in the Nature Conservation Review.
Madingley Wood is a 15.4 hectare biological Site of Special Scientific Interest near Madingley, on the western outskirts of Cambridge.
Brackland Rough is a 10.7 hectare biological Site of Special Scientific Interest in Fordham in Cambridgeshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire as Fordham Woods.
Little Paxton Wood is a 44.1-hectare biological Site of Special Scientific Interest west of Little Paxton in Cambridgeshire.
Aversley Wood is a 62.3 hectares biological Site of Special Scientific Interest south-west of Sawtry in Cambridgeshire. It is owned and managed by the Woodland Trust.
Eversden and Wimpole Woods is a 67.1 hectare biological Site of Special Scientific Interest between Kingston and Orwell in Cambridgeshire. The site has been designated a Special Area of Conservation for its barbastelle bats.
Langley Wood is a 31.6 hectare biological Site of Special Scientific Interest in Cambridgeshire, but lying between Saffron Walden in Essex and Haverhill in Suffolk.
Carlton Wood is a 10.4 hectare biological Site of Special Scientific Interest on the eastern boundary of Cambridgeshire, and west of Great Bradley in Suffolk.
Badsaddle, Withmale Park and Bush Walk Woods is a 25.2 hectare biological Site of Special Scientific Interest north-west of Wellingborough in Northamptonshire.
Banhaw, Spring and Blackthorn's Woods is a 123.4 hectare biological Site of Special Scientific Interest east of Corby in Northamptonshire.
Valley Farm Pit, Sudbourne is a 0.5 hectare geological Site of Special Scientific Interest north of Orford in Suffolk. It is a Geological Conservation Review site, and in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Cherry Hill and The Gallops, Barton Mills is a 10.4 hectare biological Site of Special Scientific Interest south of Barton Mills in Suffolk. It is a Nature Conservation Review site, Grade 2.
Hazeley Heath is a 180.8-hectare (447-acre) biological Site of Special Scientific Interest west of Farnborough in Hampshire. It is part of Thames Basin Heaths Special Protection Area for the conservation of wild birds.
