The 1907 Southern Pacific depot is a handsome brick-and-tile station built when Tucson was the main railroad town on the southern transcontinental line. Amtrak still uses it; the Sunset Limited and Texas Eagle pass through three times a week in each direction.
Out front stand a restored Southern Pacific locomotive (1673) and a vintage passenger car, both maintained by the volunteer Southern Arizona Transportation Museum next door. The small museum is free and worth a half-hour.