The Former Great Western Road, Prospect has aesthetic and landmark significance at state level for its capacity to demonstrate the experience of travel with views of historical significance on a remnant section of the 1818 road that remains largely undeveloped and on its original 1818 alignment as it follows a ridge line and winds up and over the flanks of Prospect Hill in a semi-rural landscape with views of historical significance across to the Blue Mountains from the road's highest point close to Watch House Lane.