Dunno if I managed to find something new or not but I thought I would bring it up since I did not find it in any threads.
Got to Last Station and was fiddling around trying find something and found a Royal Coin(+4 Str ). At the entrance of the Metro stop area immediately go left you will run into the edge, then go down you will hit the wall, finally go left you will go into the black area a bit, hit enter and viola!