My wife and I spent a weekend in Boston recently. One thing we noticed was that we could sleep really well there. It was so nice. The first reason was fairly obvious. We left our kitties at home. They've lately adopted the routine of waking us up multiple times for food or attention at all hours. We love the kitties, but it would be nice if they let us sleep more often.
The other reason wasn't immediately apparent. I couldn't quite put my finger on it until we saw an ambulance driving down the street. We were like - "heeeyy, there weren't any sirens last night." We haven't had a siren-less night in quite a while. The ones near our house are especially annoying in that it's like the drivers are starting and stopping them repeatedly. There's no constant rhythm to them. They also go off at all hours of the night, driving us crazy.