Classified for credit

Oklahoma's highest point in Black Mesa country with mesa geology, fossils, and shortgrass prairie — covers Great Plains geography, stratigraphy, and High Plains ecology.

West Virginia state park anchored by a 65-foot waterfall in a mixed hardwood canyon — geology, forest ecology, and watershed study with developed trails.

AZA-accredited zoo in Des Moines with conservation programming — supports zoology, animal biology, and wildlife conservation curricula.

Historic 33-acre estate with formal gardens, arboretum, and Rhode Island botanical collections — supports dendrology, horticulture, and 19th-century estate history.

Formal and wild garden reserve on Bainbridge Island featuring diverse ecosystems — supports plant ecology, landscape design, and Pacific Northwest biodiversity study.

469-mile scenic parkway through the Appalachians offering geology, forest ecology, and Appalachian cultural history via ranger programs and visitor centers.

Trail through Natural Bridge State Park — karst geology, Appalachian forest ecology, and Virginia's iconic natural limestone arch.

Florida state park on the St. Johns River with a first-magnitude spring — supports freshwater ecology, manatee biology, and Florida karst geology study.

Mississippi safari-style animal park — introduces zoology, animal behavior, and conservation through close-encounter viewing.

Large formal botanical garden with themed collections — plant biology, garden design, and Midwest native species.

Olympic Peninsula state park within the Hoh Rain Forest corridor — covers temperate rainforest ecology, old-growth biology, and Pacific Northwest geography.

Large national forest in central Idaho with diverse ecosystems — forest ecology, geology, watersheds, and outdoor science fieldwork.

Federal wildlife refuge on the Delaware Bay flyway — supports migratory bird biology, wetland ecology, and waterfowl conservation studies with observation towers and trails.

Outdoor garden themed around children's literature — connects plant biology and nature observation to classic picture books and reading curriculum.

National wildlife refuge hosting massive sandhill crane and snow goose migrations — field study in migratory bird ecology and riparian habitat conservation.

NWR visitor center on the Rio Grande flyway — covers migratory bird ecology, riparian habitat, and wildlife conservation programs.

National Wildlife Refuge on the Rio Grande flyway — covers migratory bird ecology, riparian habitat biology, and Chihuahuan Desert natural history.

National and state park island chain in Boston Harbor — covers coastal ecology, tidal zones, and 19th-century harbor fortification history.

Island state park in Boston Harbor with ranger programs covering coastal ecology, marine biology, and Civil War-era fort history.

Brooklyn Botanic Garden with 52 acres of curated plant collections — supports botany, plant taxonomy, and seasonal ecology study.

Tropical botanical garden on Hawaii's Big Island — rainforest plant diversity, ethnobotany, and Hawaiian ecosystem ecology.

New Mexico state park featuring sinkholes filled with spring water — covers karst geology, aquifer science, and desert lake ecosystems.

Dramatic Snake River canyon state park with a 200-ft waterfall — covers canyon geology, basalt formation, and Idaho river ecology.

Scenic valley in the Buffalo National River corridor with elk herds, karst geology, and Ozark cultural-history context.