Knowing nothing of the the movie Niagara (1953) I first flew over the USA Niagara and quickly realized it must be in Canada. At that point I landed at the Victoria Park Restaurant, it was a stone building but nothing like the one in the picture. I quickly learned it wasn't a new building and started looking more.
In Googling the picture there were other screen grabs from the this scene from the movie, one of them was Marilyn's famous walk said to be the longest walk in film history at 116 feet. In one of those pictures you can see a bridge in the background. Not obvious in the picture but I assumed it was the same scene.
I then cruised up the road till I could make the view work. at that location was a building that at a glance looked nothing like what was in the movie.
In looking into that building (to see if it may have been replaced). I then found a picture of a building that matched the movie.
I looked back at Google Earth and could see that the original building has been absorbed into the one that is there now.
I had hopes of finding elements of the original facade but nothing but parts of the turrets and upper level windows.
The next one was taken in Reno while on location of The Misfits (1961). Like I had mentioned it was pretty straight forward. Again not knowing the movie with the street signs this just said Reno to me, sure enough there was an intersection of these two streets, but was it this intersection? In looking at the movie information I now figured it must be Reno but for me that was not enough (people on the internet said it was Reno and they are always right).
This view just didn't look right, close but no cigar. The building in the foreground is different (or a major facelift).
The next building back looked right, but the perspective was off, a lot.
Looking at a 1967 Topo I could see that the street alignments were different making the crosswalk that she is on part of a tee intersection.
This realignment happened about 1966/67, not too long after production. Ok maybe not a big difference (45-50').
Alan