If you happen to pass by Jones Bridge in Quiapo, Manila, do shop under that bridge. There are interesting souvenir shops there (yes! right under the bridge!) and a souvenir department store near them.
I just remembered now, while I and my pretty wife were shopping there for sending to US relatives, we discovered what I called "secret passages" going deeper inside the shops. Inside were more interesting souvenir items and strange-looking sellers. The place looked exciting and a bit mysterious--like you were going to find a secret entrance anytime leading straight to Baguio or Tagaytay!
Go there and find out!