This would put me to sleep.
This is fun. Well, not fun fun, but it's sort of cool and relaxing I guess. You Are Listening To Los Angeles is a website that combines LA police scanner radio with ambient music/noise to calm you down and set a mood. What mood is that? I dunno. But it reminds me of the movie Drive for some reason.
If you don't think LA scanners are interesting, you can switch the police scanner to another major US city.