On a Road Scholar tour we went to Anglesey to see Penmon Priory and St Seiriol's Well which was a stop on the pilgrimage route to St David's in the Middle Ages. Apparently 2 or 3 trips on the St David's pilgrimage route was the substitute for one pilgrimage to Rome according to our guide. There are a couple of medieval crosses in the priory and a SheelaNaGig which remained by the front door of the church until the 1970s or so but is now moved inside in a side room with the medieval crosses.
About Penmon Priory:
About the SheelaNaGig:
The medieval Misericords from the choir area of Penmon Priory are now located in the church of St Mary and St Nicholas in Beaumaris.
There is also an Elizabethan dovecote across the road from Penmon Priory.
I found the Priory and the Beaumaris church very interesting, however, I do believe you would need to rent a car to see this area!