It's interesting to look into differing beliefs and values. An outing to Santo André de Teixido Church is a fantastic way to better understand one of the local religions.
You're spoiled for sightseeing choice when staying in San Andres de Teixido. Santo André de Teixido Church is an ideal place to kick off here, but there are many other fine places to discover. Vixia de Herbeira, Praia de Sismundi, and A Madalena are not far from the house of prayer and will fill in your day nicely.