Stock photography, photos: Bushwalkers follow a trail through Stock photos of Bushwalkers admire the ancient plant life in the escarpment heathland in Sydney's Kuringai National Park. Photograph: © David F Hancock Click for a larger image and more information Keywords associated with this stock photo: sydney, australia, environment, environmental, hawkesbury, river, national park, parks, waterways, plant, plants, ancient, old, grasstree, blackboys, Xanthorrhoea , Grass-trees, heathland, heathlands, eucalyptus