Classified for credit

Maryland's largest freshwater lake state park in Garrett County — covers freshwater ecology, glacial lake geology, and Appalachian mountain biology.

Monmouth County horticultural park and demonstration garden — plant science, garden design, and seasonal ecology across themed garden rooms.

Jefferson County open-space canyon park with marked trails through mixed-grass foothills — covers Colorado geology, native plant communities, and physical fitness.

Utah reservoir state park with boating and shoreline trails — supports water-cycle geography, aquatic ecology, and outdoor PE.

Ohio state park with lake, trails, and natural areas — supports freshwater ecology, local wildlife study, and outdoor physical education.

Federal wildlife refuge on the Snake River — supports migratory bird biology, wetland ecology, and waterfowl conservation curriculum.

National Wildlife Refuge visitor center on the Snake River — covers migratory bird ecology, wetland conservation, and Pacific Flyway geography.

Small roadside deer ranch in the Upper Peninsula where children interact with tame deer — basic mammal biology and animal husbandry observation.

Farm animal park and petting zoo — basic animal husbandry, domestic species identification, and farm ecology for younger learners.

South Florida municipal arboretum with labeled tropical and subtropical species — supports plant taxonomy, botany, and regional ecology.

Traditional New England agricultural fair covering animal husbandry, crop cultivation, and rural heritage.

NH Audubon wildlife sanctuary with self-guided trails supporting bird identification, forest ecology, and wildlife habitat study.

Community arboretum and nature center with interpretive trails covering native Middle Tennessee flora, wildlife habitat, and watershed ecology.

County river preserve park with gardens and natural area along the St. Joseph River — supports riparian ecology, native plant identification, and outdoor observation.

Managed nature center with trails and natural habitats — supports local ecology, wildlife identification, and outdoor science.

Arkansas state park on DeGray Lake with trails, beach, and interpretive programs — covers Ouachita Mountain ecology, freshwater biology, and outdoor recreation.

Developed state park resort on DeGray Lake — Ouachita Mountain ecology, freshwater biology, and outdoor recreation with ranger programs.

Historic 19th-century canal corridor converted to a trail — covers canal engineering history, riparian ecology, and New Jersey industrial heritage.

Historic 19th-century canal corridor state park supporting hydrology, engineering history, riparian ecology, and transportation geography study.

Native-plant-focused botanical garden on Delaware's coastal plain — supports plant biology, Mid-Atlantic ecology, and conservation studies.

Barrier-island state park on Delaware's Atlantic coast — covers coastal geology, beach ecology, tidal dynamics, and migratory species.

Delaware state park campground on a barrier island — coastal ecology, Atlantic shoreline geology, and estuary habitats accessible via developed beach and bay access.

Ohio state park on Delaware Lake with trails, ranger programs, and lake ecology — supports biology, freshwater science, and physical education curriculum.

Federal wildlife refuge in the Sacramento Valley managed for wintering waterfowl — supports study of migratory bird ecology, wetland management, and the Pacific Flyway.