High Quality Content by WIKIPEDIA articles! The Macquarie Lighthouse, also known as South Head Upper Light, was the first, and is the longest serving, lighthouse site in Australia. It is located on Dunbar Head, Vaucluse (approximately 2 km south of South Head) near the entrance to Sydney Harbour. There has been a navigational aid in this vicinity since 1791 and a lighthouse near the present site since 1818. The current lighthouse was completed in 1883.