Classified for credit

Operating electric railway museum with restored interurban cars — covers California transportation history, electrical engineering, and industrial heritage.

Natural history and paleontology museum focused on Ice Age megafauna from the Diamond Valley Lake excavation — covers fossil science, geology, and prehistoric ecology.

NPS recreation area with reservoir, waterfalls, and forest ecosystems — covers hydrology, ecology, and California natural history with ranger programs.

Hands-on regional science museum with interactive exhibits covering physical science, biology, and applied math for school-age learners.

Hands-on nature and science center at Sanborn County Park — supports biology, ecology, and earth science through live animals and interactive exhibits.

Outdoor agricultural history museum near Watsonville with historic farm equipment and buildings covering California farming heritage.

Santa Paula agriculture museum covering California citrus, oil, and farming history — applied history of food production and rural California economy.

Agua Caliente Band of Cahuilla Indians cultural museum covering tribal history, language, and indigenous material culture of the Coachella Valley.

Private planetarium offering guided astronomy tours — covers celestial mechanics, star identification, and planetary science through telescope and dome presentation.

Site of California's only all-Black town, founded in 1908 — covers African American history, the Great Migration west, and civil rights in California.

Urban nature center in Riverside with trails and habitat areas — local ecology, native wildlife, and Southern California plant biology.

Interpretive center for Siqueiros's 1932 América Tropical mural on Olvera Street — Mexican muralism and LA cultural history.

Ancient Kumeyaay winter village site in Anza-Borrego Desert State Park — covers California Indigenous archaeology, settlement patterns, and desert survival.

Gold Rush-era museum in Calaveras County covering California mining history, the 1849 rush, and Mark Twain's regional literary connections.

State natural reserve protecting the largest single display of the California poppy; covers native plant ecology, wildflower biology, and desert geography.

State museum dedicated to California Native American cultures — covers Indigenous history, archaeology, and material culture of the Antelope Valley region.

Open-air museum of working antique gas and steam-powered farm equipment — covers mechanical engineering history, thermodynamics, and agricultural technology.

University arboretum and botanical garden with labeled plant collections — supports botany, plant taxonomy, and environmental horticulture.

Stanford University desert plant collection — covers arid and semi-arid plant adaptations, taxonomy, and Southwest ecology.

Art instruction studio offering classes in visual arts — hands-on studio practice in drawing, painting, and mixed media.

Fresno cultural arts center dedicated to Latino and Chicano visual arts — supports multicultural art history, social studies, and California heritage.

Public observatory in the San Joaquin Valley offering telescope viewing and instruction in observational astronomy.

Small Santa Paula museum preserving historic aircraft and aviation artifacts — covers aeronautics principles and California aviation history.

Oldest surviving house in Los Angeles on historic Olvera Street — covers Spanish colonial settlement, rancho-era California, and early LA history.