Classified for credit

Amateur astronomical observatory open for public star parties — covers telescope optics, celestial navigation, and observational astronomy.

University research observatory offering public viewing nights — covers telescope optics, stellar astronomy, and observational methods.

FAU Harbor Branch ocean research facility visitor center covering marine biology, oceanographic research methods, and Atlantic coastal ecosystems.

College of Southern Idaho planetarium offering public astronomy shows — covers celestial mechanics, the solar system, and observational science.

University-operated planetarium offering public shows on astronomy and space science — covers celestial mechanics, star life cycles, and space exploration.

Research observatory in the Jemez Mountains with public viewing opportunities — optical astronomy, telescope optics, and dark-sky science.

Fossil and history museum in western Kansas featuring Niobrara chalk-bed specimens — covers paleontology, stratigraphy, and Kansas natural history.

Historic gristmill in West Virginia demonstrating grain milling mechanics — covers simple machines, water power, and Appalachian agricultural history.

Fire apparatus museum with historic engines and equipment — covers firefighting technology, engineering history, and public safety.

Iowa DNR fish hatchery facility — applied aquaculture, fish biology, and freshwater ecosystem management.

Hands-on aquaculture and fisheries education facility — covers fish biology, aquatic ecosystems, and water science.

Bureau of Reclamation dam visitor center with guided tours — covers hydroelectric power generation, concrete arch engineering, and water resource management.

Florida aviation museum with historic aircraft — aeronautical engineering, flight history, and aerospace science from early aviation to jets.

Private aquatics and marine life facility in Vero Beach — covers aquatic biology, marine animal behavior, and water science.

Working farm and animal rescue — covers animal husbandry, agricultural biology, and ecosystem stewardship through hands-on interaction.

Working tropical fish farm in Wimauma — covers aquaculture, freshwater fish biology, and commercial fish breeding practices.

Working glass-arts center with hot-shop demos — covers the science of silica chemistry, heat and viscosity, and the craft history of glassblowing.

California State Historic Landmark powerhouse preserving original 1895 AC generators — covers electrical generation history, engineering, and energy transmission.

University-based food-science innovation center — applied food chemistry, agricultural processing, and product development from farm to shelf.

Community college public observatory with telescopes — covers astronomy, optics, and celestial mechanics.

Hands-on forest ecology center covering tree biology, forest ecosystems, and sustainable forestry through interactive exhibits and outdoor spaces.

Ancient volcanic maar (tuff ring) in the Oregon high desert — covers volcanology, geology, and prehistoric Native American habitation of the site.

Fossil discovery center with local San Joaquin Valley paleontology exhibits and dig-site specimens — earth science, paleontology, and prehistoric ecology.

Small Oregon museum adjacent to public fossil beds where visitors can observe and learn about Eocene plant and leaf fossils — covers paleontology and earth science.