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. According to Natural England, this wood has one of the finest stands of hornbeam in the county. Other trees are ash, field maple, hazel and pedunculate oak. There is a variety of flora typical of ancient woodlands such as oxlips and early-purple orchids. The wood is private land with no public access.