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This 1,200-mile trail follows the route of the Spanish exploratory voyage in 1774, beginning in Nogales on the Arizona-Mexico border, heading north through Santa Cruz county to Tucson and then Phoenix, and then west to California. The entire route can be followed by car, and some segments can also be completed on foot. AnzaHistoricTrail.org is helpful for detailed route planning.
Kitt Peak a "don't miss" for the astronomy buff: there are several astronomical telescopes plus a large solar telescope.
Established as a National Monument in 2000, the monument is managed by the Bureau of Land Management (BLM) for multiple uses, including ranching and recreational use. It is noted for significant concentrations of Ironwood trees, and for over 200 pre-Columbian archeological sites. Popular activities include hiking, mountain biking, horse riding, birdwatching, and looking at the many archeological remains. There are no developed facilities, but primitive camping is possible provided campsites are at least 200 ft away from water sources and campers use biodegradable soap.