The two areas of the SSSI are grassland on chalk scarp which have a diverse flora including rare species. Much of the parkland is managed by grazing, but ungrazed scrub on sloping areas provides habitat for invertebrates and breeding birds.[3]
In the wooded Chiltern escarpment are former carriage rides. One of these, King Charles Ride or the King's Ride, forms part of the Ridgeway National Trail. In 2013 work started to restore King Charles Ride by replanting a circle of lime trees at the 'rond point' and improving the vista over the park and town. In the northeast corner are two Grade II listed monuments: an obelisk known locally as Nell Gwynne's monument, and the summerhouse with a grand four-column temple-style portico.