Anza Borrego State Park sits in the desert between San Diego and Riverside. It is California's largest state park, and one of the most expansive in the nation at more than 585,000 acres. Anza Borrego has more than 100 miles of hiking trails, though the desert climate means that it is easier and safer to sightsee by driving along the 500 miles of dirt roads inside the park.
Bighorn sheep top the list on animal inhabitants, with desert birds, insects, reptiles and cacti also on the sightseeing menu. There have been archeological discoveries inside the park, including impressive examples of pre-Colombian rock art.