Hornby Lighthouse, located near Watsons Bay in Sydney Harbour National Park, is a historic gem with stunning views of Sydney Harbour and the Pacific Ocean. Built in 1858 after a shipwreck, this iconic red and white striped tower is a great spot for whale watching in winter. Accessible via an easy walk along the South Head heritage trail, it's a must-visit for anyone looking to soak up some history and enjoy breathtaking scenery.