Craignaw is a small but very rocky hill in centre of the Galloway Hills of southern Scotland. Unlike many hills in the Southern Uplands, Craignaw has a complex and rocky summit area, with a long line of crags and rough ground on the east side. The hill is largely composed of granite. Near the north end of the hill is an interesting area of terrain known as the "De'ils Bowlin' Green" where various rounded granite boulders are scatterd at random over an area of nearly horizontal granite slabs. These are believed to be glacial erratics or result from a similar glacier process. On the west side of the hill, near grid reference NX458831, a few hundred meters from the summit is an F-111E Aardvark crash site. The site is marked by a small memorial to the two US Airforce pilots who were killed in the accident (Captains Spaulding and Hetzner). Although the crash happened on December 19, 1979 there are still small amounts of aircraft debris in the area.