On the summit of Oldbury Hill, commanding a powerfully defensive position, is one of the finest Iron Age hill forts in the Medway, with substantial earth ramparts 2 miles in length. Ancient woodland, scrub and relic heathland disguise its complete outline. The woodlands support oak, birch and Scots pine with a variety of fungi and plants from the former heathland, including heather and bilberry. Areas of oak coppice are being re-coppiced, making this one of the few Kentish woods where this traditional Wealden management is being practised. The hills and woods are a Greensand Ridge Special Landscape Area and part of the Metropolitan Green Belt, managed by the Kent County Council. The small caves and shallow rock shelters in the sandstone ridge were probably used by paleolithic man.