NOW YOU SEE ME NOW YOU DONT!!
If you go to canals on the side you have to go left to get to go under your bidge is the side you need to be on. When you first reach the first fleet of stairs to the left of your bridge there is a piller to the right that you must get on by pushing A. Once ther crouch with left analog and you will see the sign to jump over stuff. Press a and you will jump into the wall. The only thing is that you will fall back out. This is the begginning of a glitch to get into the walls of canals. If I figure the rest of the glitch out I will post again. This really works.
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