With an area of approximately 119 square kilometres Port Stephens is larger than Sydney Harbour. On 1 December 2005 the Port Stephens-Great Lakes Marine Park was established. The park includes all of Port Stephens, the Karuah and Myall rivers and all their creeks and tributaries under tidal influence. Port Stephens is a popular tourism destination with a strong focus on aquatic activities such as whale and dolphin watching, fishing and recreational boating.