woofgang, yes, they do. Two, one on each side. You can go on both to see the crowns from both sides. There was hardly anyone there when I was there (no wonder they needed my services) but it was just as schools were going back, which is apparently the quietest time of the year.
I've just ben to an exhibition on postwar London town planning, specifically the schemes that didn't happen. (It was staged by English Heritage, who seem quite content with the failures.) One seems to have involved concreting over all Soho and building a few tower blocks and a dance hall. There was a pigeon cam, made up with 3D modelling of London by Google Earth. You stood in front of a little camera and pretended to be a bird - waving your arms or pointing your beak down - and the aerial picture of London would move in front of you so it looked as if you were flying over the town, circling the Shard, or whateer you wanted to do. There was something in the camera reading your body movements and tracing the route accordingly very clever, if you don't mind standing in front of a camera and flapping your wings.