From a my trip to Bressingham in the summer - the narrow gauge railway engine shed.
A couple of interesting points - first, I need to note the direction of slope on the back of door diagonals. It's something I always seem to get wrong on a model.
Second, look how much stuff you can see through the doors. Model signal boxes usually win in the "building crying out for an interior" competition, but engine sheds, at least single road ones on small lines, must come a close second.