Classified for credit

High-desert reservoir state park on the San Juan River — supports study of arid-land ecology, water resources, and New Mexico geology.

State park campground on Navajo Lake — high-desert and ponderosa pine ecology, freshwater biology, and outdoor field study in northwest New Mexico.

Colorado state park on Navajo Reservoir — supports geology, high-desert ecology, and Colorado/New Mexico geography units.

Wetland nature center with trails and wildlife habitat — covers ecology, wetland biology, and Wisconsin native species.

County environmental education center with trails and interpretive programming covering Iowa prairie, woodland, and watershed ecology.

Restored tallgrass prairie refuge with visitor center — covers prairie ecology, native species restoration, and Midwestern biogeography.

Nature center in the Santa Barbara foothills — covers California native plant ecology, wildlife biology, and conservation through exhibits and trails.

650-acre woodland nature reserve near Omaha with trails and interpretive signage — supports study of eastern Nebraska forest ecology and wildlife.

Urban wildlife refuge lagoon in Santa Cruz supporting migratory birds and wetland species — covers wetland ecology, ornithology, and water-system biology.

Large national forest encompassing the hand-planted Bessey Nursery — reforestation ecology, Great Plains geography, and forest management history.

The largest hand-planted forest in the U.S. — covers reforestation ecology, Great Plains geography, and silviculture in a unique human-made forest ecosystem.

University-affiliated display gardens showcasing Nebraska-hardy plants — botany, horticulture, and regional plant ecology.

Federal wildlife refuge visitor center in central Wisconsin — covers crane and wetland species conservation, migratory bird ecology, and refuge management.

Federal wildlife refuge known for whooping crane recovery — covers wetland ecology, endangered-species biology, and conservation policy.

Nature and wildlife art center along the Susquehanna River — integrates natural history, Pennsylvania wildlife ecology, and nature illustration as a curriculum bridge.

Urban riparian preserve on the Riparian Preserve at Water Ranch — supports desert wetland ecology, migratory bird study, and water conservation concepts.

Oregon coastal state park on Nehalem Bay — beach ecology, dune systems, and developed campground.

Wisconsin state park on the Mississippi River bluffs near the site of Nelson Dewey's historic farm — combines riparian ecology study with early Wisconsin statehood history.

Old-growth maple-basswood Big Woods remnant in Minnesota with waterfalls and diverse understory flora — supports forest ecology and native plant biology.

Pennsylvania state park with lake, wetlands, and forested trails — supports ecology, wildlife biology, and outdoor PE units.

Oregon coastal wildlife refuge protecting estuary and grassland habitats — supports study of Pacific flyway bird migration and estuarine ecology.

City nature park with a planetarium, nature center, and wildlife exhibits — covers local ecology, wildlife biology, and outdoor science.

Lake Tahoe beach access in Nevada — alpine lake ecology, geology of the Sierra Nevada, and water quality observation opportunities.

Nevada state parks visitor center at Cathedral Gorge serving multiple parks — covers Great Basin geology, desert ecology, and erosion science.