Taos has been mentioned, but the ruins of the old church at Taos Pueblo always feel like a place of pilgrimage to me.
In 1847, a number of the former Mexican citizens fomented a rebellion against the military government set up after the war with Mexico. A few leaders at the Indian Pueblos joined with them, including two from Taos Pueblo.
The military governor, Charles Bent, on a visit to Taos, was asassinated, supposedly with the aid of Indians from the Pueblo. Troops of the occupation lay punitive siege to the pueblo, attacking the pueblo and its church with cannon fire.
Women and children of the Pueblo had taken refuge in the church and many were killed.
The Taos Puebloans keep the church ruins in a state of preservation as a memorial to the massacre.