I'll recommend visiting the Caverns at Kartchner Caverns State Park, Southeast of Tucson near Bisbee. Visits are limited to certain times of the year, # of visitors is limited, you have to make reservations in advance. It's worth the trip. It's a "living" cavern as opposed to most caverns. An interesting story of how it was discovered and protected until being made part of the Arizona Park system and opened to the public.
After last night I have to add Mama Louisa's on 2041 South Craycroft in Tucson on the must-go-to list. Friendly Italian place with excellent food. Not too far from USA either and they have carry-out, not to mention real Italian sodas. I'm going back tonight.
Aero, I'll be there with a buddy we're staying with out there that has never been to a sprint car race. Thursday we'll be in the pits through qualifying and then move to the stands. I'll keep a sharp eye out for you. Hope you are doing great!
visit Old Tucson. High Chappral and a host of John Wayne movies were made there. For supper try The Corral. A drive up Mt Lemmon is pretty impressive. Take in a sunset at Gates Pass if time allows.