Tucson, AZ: then and now

4 real landmarks in Tucson, each with an old photo you can fade into today's view. Find four landmarks around Tucson. At each one, check in to earn its badge, unlock its story, and collect a Time Card. Do them in any order. Everything stays on this phone.

• Mission San Xavier del BacA bright white church in the desert, about 230 years old.
• Tucson DepotA train depot that was restored to look like it did in 1941.
• Pima County CourthouseA courthouse with a tiled dome, now a visitor center.
• Old Main, University of ArizonaThe first building at a university that started with 32 students.

Written from sources; not yet walked on site unless a stop says otherwise.