Bloodborne - Unseen locations

So in these videos you see how the broken spacetime in Bloodborne works, the layers. You can try it too, go write on the sky. You put some shiny coins in specific places and move to another location, the title changes at the bottom right of the screen. As you look from another location, things are not there anymore, so the shiny coins shows up for you in the sky. It is not a bug, it is a clue, like the snail girl falling from the sky or the Choir saying the cosmos is right above our heads. There must be more, I have not found yet. Can you find other places? The layers of Bloodborne. There must be more to find, time to stargaze, hunters!