San Diego Natural History Museum Admission. Explore fascinating aspects of the natural world on display at the San Diego Natural History Museum. Centrally located in pretty Balboa Park, the natural history museum is the oldest scientific institution in California, with a focus on southern and Baja California. Your general admission ticket provides entrance to the museum and a variety of fascinating exhibits that are spread out over five floors. You can also watch films in the giant-screen theater — a great excursion for the whole family! Book San Diego Natural History Museum Admission From $19.00.