Just a grand old view of the roundhouse at Inverness, Scotland in 1913, with covered turntable:http://abpr.railfan.net/abprphoto.cgi?february04/02-29-04/hr_18a_inverness.1913.jpg

Interesting shed - almost a complete circle. A wonderful stone entrance arch (with track through the arch) and a one track gap either side. Sadly flattened years ago. Unfortunately there don't seem to be images online to show it.G