Classified for credit

Mid-mountain staging area for Mauna Kea observatories — covers astronomy, high-altitude meteorology, and Hawaii's unique volcanic and dark-sky environment.

Maunakea mid-level visitor station at 9,200 ft — covers astronomy, atmospheric science, and the world's largest telescope complex.

Kansas wildlife refuge hosting free-roaming bison and elk herds — wildlife biology, Great Plains ecology, and native species conservation.

Hands-on children's museum with natural history, science, and early-literacy exhibits tied to Baylor University collections.

Dark-sky park and observatory complex in the Blue Ridge Mountains — covers astronomy, light pollution science, and observation of deep-sky objects.

Historic urban estate with native wildlife exhibits, botanical garden, and working farm — covers ecology, horticulture, and Virginia natural history.

Gilded Age estate with mansion, formal gardens, and wildlife exhibits — covers late 19th-century American social history and landscape design.

National Tropical Botanical Garden with guided tours of rare tropical plant collections — covers botany, conservation biology, and Pacific island ecology.

University of Tennessee natural history and archaeology museum — covers paleontology, anthropology, regional geology, and Indigenous cultures of the Southeast.

State park centered on a restored 19th-century grist mill — covers water-powered milling mechanics, geology of Slippery Rock Gorge, and industrial history.

Museum inside a working Chicago River lift bridge — covers hydraulic engineering, bridge mechanics, and the role of the river in urban development.

Railroad heritage park with antique locomotive rides, a model-train museum, and a carousel — covers railroad history and early transportation technology.

Indiana's first state park, featuring a limestone canyon and waterfall — covers karst geology, forest ecology, and Indiana natural history.

State park nature center adjacent to Indiana's first state park — covers karst geology, canyon formation, and native forest ecology.

World's largest lepidopterology collection housed at the Florida Museum of Natural History — covers butterfly taxonomy, biodiversity, and specimen science.

Hands-on children's museum with interactive exhibits in literacy, STEM, and community roles for early-childhood learners.

Preserved antebellum plantation site interpreting enslaved life and the Gullah Geechee heritage — primary-source American history.

Hands-on science center with IMAX theater — covers physics, earth science, biology, and large-format science film programming.

Oldest-known archaeological site in North America with a living-history village — covers pre-Columbian archaeology, stratigraphy, and early American settlement.

National forest spanning Wyoming and Colorado — covers Rocky Mountain ecology, forest management, geology, and watershed science.

Vast national forest and grassland complex — supports ecology, biome comparison, geology, and geography across diverse Rocky Mountain and high-plains habitats.

Wyoming archaeological site with prehistoric rock art and stratified dig layers spanning 10,000 years — covers archaeology, indigenous history, and geology.

Historic frontier town associated with Theodore Roosevelt's Badlands ranching — covers late 19th-century Western history, conservation origins, and cowboy culture.

Botanical garden and arboretum with outdoor sculpture — covers plant biology, ecology, and landscape design across 158 acres.