I've discovered a little piece of Magic on the internet.
In a previous post, I drew attention to the Antonine Wall at Dobbies Garden Centre. Now, using the UK government's online rural GIS system (snappily entitled Multi Agency Geographic Information for the Countryside, or Magic), you can tap into large-scale Ordnance Survey mapping to analyse any geographical feature: say, the Antonine Wall at Dobbies Garden Centre!
Using the Magic data, you can see that the Antonine Wall (running from west to east) crosses the A879 and turns abruptly SE. Amazingly, on the aerial view (courtesy of the really, really useful Windows Live Local), you can actually see it as it turns and heads off the right-hand side of the photo.
Now don't tell me that's not impressive. Or, in fact, Magic!