Castlereagh, New South Wales
The suburb is one of the most historic sites in Australia's colonial history, being one of the five Macquarie towns officially proclaimed on 6 December 1810.The earliest known European development was the building of Hadley Park, between what is now Castlereagh Road and the Nepean River.[4] Nepean Park, c. 1822, is also situated on Castlereagh Road, and was built by convict labour for John Single.The suburb's historical importance is reflected in its many surviving farmhouses, outbuildings, churches and cemeteries.[1] Castlereagh Road is one of the important transport links in Sydney connecting the Hawkesbury and Penrith regions.