Nightingale PTR Portal
A number of missing walls are in the Fae structure under the statue near the NTTC. Out of bounds areas can be seen. I'll add other comments for out of bounds views or access as I find them.
Out of bounds in the wall behind the tudor house next to one of the sewer entrances
Found slightly askew fae part in the fae structure under the statue near the NTTC
Out of bounds access into building interior next to building with Louis escort mission
Out of bounds access into the greenhouse on the right side of the Crystal Palace (if you are facing the entrance of the crystal palace from the Royal District). Underneath the overhang there is a spot you can enter