If I recall correctly... It is directly across from the exit to St Peters, so on the same wall that you enter in but at the other Edge. It takes you back to t

If I recall correctly... It is directly across from the exit to St Peters, so on the same wall that you enter in but at the other Edge. It takes you back to the beginning of the tour and then you can wander with the river folk and take a side route which I don't remember to get to the rest of the grounds