Classified for credit

Remote island national park in Lake Superior — wolf-moose predator-prey research site; covers island biogeography, ecology, and wilderness navigation.

National park featuring desert ecology, geology, and plant adaptation — ranger programs cover the Joshua tree ecosystem and rock formation.

Accredited zoo and aquarium with strong conservation programming — covers zoology, animal adaptations, aquatic ecosystems, and wildlife conservation.

Remote national park known for brown bear viewing at Brooks Falls — covers salmon ecology, predator-prey dynamics, and volcanic landscape geology.

Coastal national park with glaciers, tidewater fjords, and marine wildlife — covers glaciology, marine ecology, and Pacific coastal geography.

New York's 'Grand Canyon of the East' — deep river gorge, waterfalls, and forest ecosystems support geology, hydrology, and ecology study.

Major botanical garden with 79 acres of curated plant collections — plant biology, taxonomy, ecology, and conservation science.

Active stratovolcano national park with ranger programs covering glaciology, alpine ecology, and Pacific Northwest geology.

National Monument preserving old-growth coastal redwoods — covers forest ecology, dendrology, and conservation biology via ranger-led programs.

Large state-operated zoo with strong conservation programs — covers animal biology, ecology, and global biodiversity.

NPS national park and preserve featuring a deep river gorge — covers Appalachian geology, river ecology, and biodiversity with ranger-led programs.

250-acre botanical garden with 50+ specialized collections — plant taxonomy, ecology, conservation biology, and environmental science.

Oldest US state park featuring direct observation of one of the world's largest waterfalls — covers hydrology, erosion, and Great Lakes geography.

North Cascades National Park offers ranger-led programs covering glaciology, alpine ecology, and Pacific Northwest geology.

One of North America's largest blackwater swamps — covers wetland ecology, biodiversity, hydrology, and Georgia coastal plain geography.

NPS park spanning temperate rainforest, alpine meadows, and Pacific coastline — field study in diverse ecosystems, geology, and Pacific Northwest biodiversity.

UNESCO-recognized national park spanning temperate rainforest, alpine meadows, and Pacific coastline — ecology, geology, and watershed biology across multiple biomes.

"Grand Canyon of Texas" — 800-ft canyon, badlands geology, and high-plains ecology in a developed state park.

America's first zoo with strong conservation programs — covers zoology, animal behavior, and biodiversity across hundreds of species.

National lakeshore with sandstone cliffs, waterfalls, and dune ecology along Lake Superior — supports geology, biology, and geography curricula.

National lakeshore with sandstone cliffs, sea caves, and Great Lakes ecology — covers geology, freshwater biology, and physical geography.

National park featuring volcanic rock formations, talus caves, and rare California condors — covers geology, ecology, and cave biology.

National Seashore on the Point Reyes Peninsula with ranger programs, tule elk, tide pools, and diverse coastal and forest ecosystems.

Old-growth coastal redwood ecosystem with ranger programs covering forest ecology, tree biology, and the tallest living organisms on Earth.