Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Ruined Castle is a famous rock formation in the Jamison Valley area of the Blue Mountains, in New South Wales, Australia. It is reached by a track which begins at the Golden Stairs, near Katoomba, and heads south-east towards the lower slopes of Mount Solitary. Nearby is the sealed opening of an old coal mine. In this area is a large clearing which was once home to the mining community and is now used by campers. The Jamison Valley forms part of the Coxs River canyon system in the Blue Mountains of New South Wales, Australia. It is situated approximately 100 kilometres west of Sydney, capital of New South Wales, and a few kilometres south of Katoomba, the main town in the Blue Mountains. The Jamison Valley was named by Governor Lachlan Macquarie in honour of Sir John Jamison (1776-1844), a prominent landowner and physician who visited the Blue Mountains with the governor in 1815. Later, as local towns were beginning to develop, the British naturalist Charles Darwin toured the area.