Wool's Orphanage is a pretty important place in the Harry Potter Universe being the childhood home of Lord you know who. It is simply said to be located to be in London. Therefore I propose the idea that Wool's Orphanage is added to the map... however, in official Harry Potter lore, the Orphanage has been replaced by office blocks so it could also be a place that you enter via the Memory Walker in Droobledore's Office, seen as at the current time, the Memory Walker has a lot of potential but not much use.