Monkey Island had some very simple but convincing harbor sounds. Screeching sea gulls. Waves. Some horns / bells kind of sounds that seemed to be influenced by the wind in a more random manner.

The good part was that it was extremely loopable and still very short. I'm guessing sound quality-wise the midi files will sound outdated now. I'm curious to see what meh_master will be able to pull of here though.