Robert Louis Stevenson once said that CaltonHill was the best viewpoint in the city as from it you could see both Edinburgh Castle and Arthur's Seat, something you couldn't from either of them.
In advance of a referendum on the establishment of a Scottish Parliament in 1978 this was converted to serve as a debating chamber.
Beyond is the long ridge of Corstorphine Hill and beyond that the open countryside of West Lothian, extending as far as Cairnpapple Hill.
CaltonHill is well worth climbing for some of the best views in the city.
On the west side of the hill, overlooking the St James Centre, is the old CaltonHill Observatory, also built by Playfair in 1818.
CaltonHill is the site of anarchic pagan festivities at the feast of Beltane in May, and at night its a popular cruising area for the nearby gay community.