The Great North Walk is a 250 kilometer (160 mile) walking trail that runs from Sydney to Newcastle. It is well sign-posted and takes about two weeks if you are to take it in one go, embarking on an adventure of mountains , lagoons, about a dozen aboriginal rock art (in Ku-ring-gai Chase National Park alone) and other artifacts of Australian cultural heritage.
The usual adventurer may prefer a day walk or two and can include plenty of diversions just off of the route, like Somersby Falls, Glenrock Lagoon, or the numerous remnants of coal mining life gone by. Then again, there are literally hundreds of attractions and activities along this lengthy route, including climbs like the easy ascent of Mount Wondabyne and the track's highest summit, Mount Warrawolong. Visit the official website for practical information, you know, like a map.