Thanks a ton for the supportive comments. This was definitely one of those times when you walk past something/someone/somewhere and you think to yourself "That'd be a great photo!". It's always satisfying too, when you find those objects to shoot, and once you've snapped the shot, you review it and think to yourself "That's exactly what I was looking to capture!"
This was certainly one of those moments.
The door itself was likely to a persons home; it was off the main streets of Antigua, but still well presented enough and in an area that suggested regular living. I don't know how welcome I would have been!