Dunns Swamp is on the Cudgegong River some 25kms east of Rylstone in the Wollemi National Park in NSW Australia apart of the Greater Blue Mountains World Heritage National Area. Tent camping sites are available and there are areas for Caravans can and trailers too. Opportunities for canoeing bush walking, fishing, photography, picnicking or just a relaxing getaway. Dunns swamp was formed when in the 1920s the river was dammed to provide water for the Kandos cement works some 25 kms away.