The Great North Road is a 240 km convict built masterpiece constructed between 1826 an 1836 to provide an overland route from Sydney to Newcastle and the Hunter Valley. It was and remains an extraordinary feat of engineering as it traverses sandstone gorges, razorback ridges and towering passes. Much of the original convict built road remains in use today although a lot of the original surface is well buried under bitumen. Convict built remains such as stone retaining walls, pick dressed cuttings, culverts, bridges and stone cut drains can be seen when driving along the road or when walking in Dharug and Yengo National Parks.historical Settlers Route through the towns of Somersby , Kulnura , Buckety , Laguna through to Wollombi.