Barton Hills NNR is a fine example of downland and woodland in the north Chilterns.
Colourful wildflowers cover the chalk grassland, plus classic downland plants like marjoram, rock rose and scabious.
In summer you will see plenty of butterflies including chalkhill blue, marbled white and dark green fritillary. The woodland contains an important population of large-leaved lime trees and look out for mammals including stoats, weasels and hares.
Barton Hills is a popular destination for walkers, families and wildlife enthusiasts. The whole site is open access, and there are a number of footpaths throughout.
Admission free.