Warrah Lookout www.nationalparks.nsw.gov.au/things-to-do/Lookouts/Warrah-lookout This lookout is in the Brisbane Water National Park and is just a few minutes from Umina Beach. It has really stunning views of Broken Bay and the Hawkesbury River. You'll see that the walk to the lookout is really lovely as well.
Bulgandry Aboriginal Art Site www.nationalparks.nsw.gov.au/things-to-do/Aboriginal-sites/Bulgandry-Aboriginal-art-site This wondeful site is near Kariong off Woy Woy Road. At the end of a short unsealed road is an easy walk to a site of Aboriginal rock art some of which you can see in the photos below. It's a lovely walk to the site which has a boardwalk around it to protect the art which was done by the Guringai people. The last photo shows lines in the rock in the bottom left and top right which are marks from sharpening stones.