Classified for credit

385-acre botanical garden with 26 distinct gardens and plant science programs — supports botany, ecology, and plant-classification curriculum.

AZA-accredited zoo with one of the oldest and most active conservation programs in the U.S. — covers zoology, ecology, and endangered-species biology.

Caldera-formed volcanic lake in the Cascades — covers volcanology, limnology, and Pacific Northwest geology with ranger programs.

Extreme desert national park — covers geology, arid-land ecology, meteorology, and is the lowest elevation point in North America.

6-million-acre national park with ranger programs — covers subarctic ecology, wildlife biology, glaciology, and Alaska geography.

Six-million-acre national park with ranger programs covering subarctic ecology, glaciology, wildlife biology, and Alaskan geography.

Remote island national park with coral reef ecosystems and Fort Jefferson — covers marine biology, ecology, and 19th-century coastal fortification history.

UNESCO World Heritage subtropical wilderness covering mangrove ecology, wetland hydrology, and endangered species conservation with ranger-led programs.

AZA-accredited zoo with strong conservation programs — covers zoology, animal behavior, and wildlife biology across diverse biomes.

Drive-through wildlife center with native and exotic species conservation programs — covers zoology, ecology, and endangered-species biology.

Remote Arctic wilderness preserve covering subarctic ecology, boreal biology, and arctic geography; visitor center in Fairbanks provides orientation.

UNESCO World Heritage Site and national park with tidewater glaciers — covers glaciology, marine ecology, and Pacific coastal geography.

National park and UNESCO World Heritage Site — tidewater glaciology, marine ecology, and coastal geography with ranger-led programming.

National park with active glaciers, alpine ecosystems, and ranger-led programs covering glaciology, ecology, and Rocky Mountain geography.

NPS recreation area spanning bay, coast, and redwood habitats — covers ecology, coastal geography, Civil War fortifications, and outdoor fitness.

One of the world's great geologic wonders — covers erosion, stratigraphy, river systems, and ecology across 277 miles of canyon.

National park featuring the Teton Range, Jackson Lake, and diverse wildlife — covers geology, ecology, and Rocky Mountain geography.

Remote Great Basin NPS unit with Lehman Caves, ancient bristlecone pines, and a dark-sky program — covers geology, ecology, and astronomy.

National park featuring North America's tallest sand dunes — covers aeolian geology, hydrology, and high-desert ecology with ranger programming.

UNESCO World Heritage site and one of the most biodiverse temperate forests in North America — covers ecology, geology, and Appalachian natural history.

Remote national park exposing ancient Permian reef geology and Chihuahuan Desert ecology — covers stratigraphy, desert biology, and physical geography.

Active shield volcano summit and crater in a national park — covers volcanology, atmospheric science, Hawaii ecology, and high-altitude biology.

Deepest river gorge in North America — covers geology, river ecology, Pacific Northwest geography, and Native American cultural history.

Ohio state park featuring caves, waterfalls, and sandstone gorges — geology, ecology, and Hocking Hills watershed biology.