Made up of much of Sydney Harbour and some of the associated islands, this national park combines various aspects of local history with the adventurous spirit of a park atmosphere. You can see aboriginal sites, old military buildings, and the historic Greycliffe Estate, all of which add an intriguing historical component to the many active pursuits to be in and around the water.
If you don't have time to travel far from Sydney, this is the place for a group of friends to enjoy the outdoors with a superlative perspective on the city skyline. There are a handful of classic half-day hikes, including the coastal brilliance of the Manly scenic walk (Mosman’s Spit Bridge to Manly Corso) and the more urban romp from Harbour Bridge to the Spit Bridge. There are some decent snorkeling and diving sites at both North Head and South Head, while plenty of beaches provide an opportunity for a quick dip when traveling along the numerous hiking tracks.