Today, hopefully, we will make it into Mexico. Our plan is to hit Saguaro National Park so Sandy’s dad can see several thousand of his dream plant, then spend the rest of the afternoon driving until we hit San Felipe, Mexico.
The saguaro, cartoondom has decided, is the quintessential way of letting you now that you are in the desert. Oddly enough, I’ve lived the majority of my life in the desert, and I’ve not seen one saguaro. Ever. Go figure. Perhaps that is because saguaros tend to all be in Arizona. Saguaro National Park is right outside of Tucson. 
Of course, the big draw of Saguaro National Park is the saguaros. So if you are a fan of the desert, this is certainly your place to go. We took a mile jaunt through the desert and found lots and lots of saguaros. Here is one of the pictures I am proud of.
Oh, and there are petroglyphs as well.
On to Me-hi-co!