294-2624, off I-19 at exit 92. Free. 7 a.m.–5 p.m. Allow 2–3 hours.
Mission San Xavier del Bac is known as one of the finest examples of mission architecture in the country. Named “the White Dove of the Desert” for stark contrast between surrounding land and building. Interior is covered with recently restored intricate, handpainted frescos. South-facing exterior is usually best photographed in the late afternoon sun. The hill adjacent to the mission provides an interesting angle.