It is mandatory to pay attention to the specific architectural beautiness of your vacation destination. The Bradt guide did describe for every single town the churches/chapels and other historic buildings of interest.
You'll notice that although Sao Miguel is the green island this doesn't count for the color scheme used in their architecture significant buildings. I just photographed those churches in its different locations.
If their just down the road...
Or on the top of everything...
In the middle of town...
Or enormous...
They all served their primary goal, being a church, not a tourist attraction. And that makes them very special.