There are a handful of NPS units within a couple of hours' drive from Phoenix. When we were here in March for spring training, we stopped to visit Casa Grande Ruins National Monument, but didn't have time to visit any of the other sites. So, on this trip we decided to check out Tonto National Monument, which preserves the ruins of 700-800 year old Salado cliff dwellings.
From Glendale, we headed east towards Mesa, took the 60/Superstition Fwy to Globe, and turned north on Rt. 188 to the monument. It doesn't look like it's that far away on a map, but it still took us a little over 2 hours to get there. The scenery along the drive was pretty, but man, beyond Mesa, you are really in the middle of nowhere!