Every day, two or three times a day, this church across the canal from our apartment rings it's bells. Aside from the fact that its quite loud, we really wouldn't pay it much mind except that the bells are completely unsynchronized. And sometimes they go on for 10 minutes or more. The clip below is the abbreviated version of only about 3 minutes long. If you don't have your alarm set, this guy will make sure you're awake.
It kind of reminds me of another alarm clock that you didn't ask for.