Okay, I'm a geek, but I'm not in this guy's league. Someone is a big big
fan of Steve McQueen's Bullitt
, a film shot in San Francisco almost forty years ago. After we'd been living in SF for a year, I caught part of the movie on TV and realized that (as with chase scenes set in New York City) very often cars were making a left on one street and appearing next on a street three miles away. But I didn't make a fetish out of it, just was rather pleased that I knew the local geography well enough to notice.
But this guy
has gone nuts. This site includes individual shots from the film, with "how they look now" photos. Since certain parts of San Francisco disappeared in the Loma Prieta quake (like the entire Embarcadero Freeway, which appears in retrospect to have been a good thing, aesthetically speaking) it's kind of fascinating. Warning--going through the entire page can take upwards of an hour. Indulge only if you're in a geeky mood.