Went to see Salt this weekend. It has a decent first half before it descended into complete stupidity; I amused myself watching Jolie closely while Mrs. __B amused herself watching Schrieber closely.
Like most people in the design professions, I have a good visual memory. It was obvious from the beginning that Salt's "Washington DC" apartment was on Riverside Drive in NYC; when we got a look out her window, you saw the roofs of the pseudo-Acropolis of Audobon Terrace, which puts the building around 154th or 153rd St and Riverside.
During the car chase that is supposed to take place in DC - and most of which was filmed in DC - there's a scene on a complicated series of highway ramps that are in downtown Albany. I recognized three buildings on the Albany skyline (one was a project of mine) and the interchange itself is distinctive if you know it.
If this had been a better movie, it would have been jarring, but given the low quality of the ideas it was just amusing. The record for movie-makers assuming the audience wouldn't catch on to a detail is still a piece of 80s crap called Over the Brooklyn Bridge which has a shot of Elliott Gould driving a car over the Manhattan Bridge during the opening credits.