Visited 6th August 2004: This is an easy site to find thanks to the Halfway Garage. My visit was extremely brief because we were pressed for time, but to be honest there isn't a great deal of ambience to be soaked up here.
A fallen stone circle opposite the "Halfway Garage" on the A859 south of Stornoway. It was discovered by Margaret Curtis, who spotted it from a bus window, apparently!
In Issue 147 (page 98) of Current Archaeology (published 1996), there's an article describing the discovery of Druim Dubh. This is the taster:
A new stone circle has been discovered at Druim Dubh on the Isle of Lewis in the Outer Hebrides. . Local archaeologist Margaret Curtis describes how she discovered the circle while travelling to Stornoway on the bus to do her shopping, and scanning the countryside: and there it was, a fallen stone circle sitting in peat cutting, beside the road!
A terribly constructed paragraph, but it serves it's purpose.