The Posted Coordinates will bring you to this beautiful history mural. When you are working on this multi take a couple of minutes to enjoy the mural.
Assume: N45 13.2AB W93 33. CCC
To solve for the final you will need to look at the window filled with glass cubes and count the number of cubes going across and -1 for A.
For B count the cubes going down and then add +3.
For CCC you will need to count all the blocks then times that number by 4 then subtract -8.
This will give you the correct Coordinates.
You can validate your puzzle solution with certitude.