As a former mining town, you might expect Ajo to be a little short on churches, but you would be wrong. There has always been a great deal of interest in religion in Ajo, and the Catholic Church and the Federated Church are two picturesque components of Ajo’s famous plaza. In addition, the Catholic Church established the St. Catherine Mission Church for the Native American people. This building now houses the Ajo Historical Society Museum. Spend a You might be surprised.