Chinatown simply rules. This is because film noir rules. To quote Juliet Deane - "This is when men were men." This 1974 classic revolves around the water crisis in Los Angeles in the late 30's. Jack Nicholson stars as J.J. Gittes, a private detective that gets wrapped up in political corruption, murder and sex. This is a long movie and one that requires several sittings to really appreciate. Also, notice that the POV is always of Gittes - what he sees and knows, you do too.