It's often interesting to delve into differing beliefs. An outing to Holy Trinity Church is a good way to learn about one of the local religions.
This house of prayer in Caledon is popular with fellow travelers, so be sure to put it on your travel itinerary. However, don't end your sightseeing there. There are a lot more places waiting for you to appreciate after Holy Trinity Church. The Caledon Casino, and SA Forest Adventures are nearby.