Like its famous counterpart in Vatican City, the interior of this lovely adobe-and-thatch church is covered with frescoes. But unlike the other Sistine Chapel, these gorgeous 17th-century paintings have a strong local influence and depict themes such as the three kings visiting Jesus on a llama train. There are plenty of biblical scenes plus some interesting artifacts in a small room behind the altar.
If the church is closed, look for a note pasted on the garage to the left of the church with the phone number of a key holder.