This map of Greenwich changes its orientation depending on where you are standing.
If you are facing the Thames it is depicted at the top of the map. If you are approaching the map from the other side with the Thames in you back its orientation changes and the Thames appears at the bottom.
This will cause some controversy amongst those who love their maps orientated north at all times. But I personally like it and I think we are getting more and more used to that way of reading maps as most navigation systems do that for us. Nice to see it implemented in the real world.