The largest span of wilderness in New South Wales, Wollemi National Park is located only 45 kilometers (28 miles) from Sydney. If you are into everything but elevation climbing, this will be your kind of trip.
You can kayak or canoe the Colo River, walk in the bio-luminescent light of the abandoned Glow Worm tunnel, or catch a lovely panorama of the Capertee Valley from Pearson's Lookout. Dunn's Swamp is quite popular with travelers for its proximity to rock art and peculiar rock formations, as well as to the ancient ruins of Newnes (ancient like MC Hammer, NOT Greece or Rome). Access the website for information on where these activities are located and a map of the park.