This 2,300-hectare (5,750-acre) park on the east side of San Diego is a naturalist’s paradise. On any given day, you can see animals indigenous to this semi-arid landscape, including coyotes, fox, hummingbirds and the small gecko lizard. The park hosts ecology and guided interpretive walks year round. It is also possible to camp in the park during the summer (Thursday through Sunday), as there are 46 fairly primitive campsites accessible to vehicles. Reservations may only be made through the website.