Wow, information overload. Too many letters, try to hide some somehow. And we can identify the famous locations of a few of these signs, but not most of them.

There seems to be a bit of a mix-up - the uncovered signage letters don't correspond to the code text by the red dots. They all need to go elsewhere.

Extracting letters from the signs is like some bizarre tangram puzzle. Then they need to go in red boxes, not near red dots, to make words like "Eratosthenes".