Classified for credit

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.

Iconic Colorado River meander incised 1,000 feet into Navajo sandstone — supports geology, erosion, and river geomorphology in a dramatic landscape setting.

Large AZA-accredited zoo with strong conservation programs — zoology, endangered species biology, and global ecosystem diversity across extensive exhibits.

Old-growth coastal redwood forest with ranger programs — covers forest ecology, tree biology, and the tallest tree species on Earth.

AZA-accredited zoo with strong conservation programs — covers vertebrate biology, animal behavior, global habitat diversity, and wildlife conservation.

Accredited zoo with conservation programs covering animal biology, ecosystems, and endangered species across multiple biome exhibits.

AZA-accredited Indianapolis Zoo — zoology, animal conservation biology, and ecosystem diversity across multiple biome exhibits.

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

Accredited zoo and botanical garden with 2,000+ animals and conservation programs — supports zoology, botany, and global biodiversity studies.

World-renowned botanical garden in Montreal with 22,000 plant species across themed gardens — botany, taxonomy, and conservation science.

Old-growth coastal redwood forest with ranger programs covering tree biology, forest ecology, and the water cycle in temperate rainforests.

First underwater state park in the US — coral reef ecology, marine biology, and snorkel or glass-bottom boat study.

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.

Free admission zoo with strong conservation programs — covers zoology, animal behavior, and global biodiversity across a large urban campus.

Drive-through safari park with free-roaming African and exotic animals — zoology, animal behavior, and conservation biology in a naturalistic setting.

World-class botanical garden with 1,100 acres of themed gardens — covers plant taxonomy, horticulture, ecology, and landscape design.

Major accredited zoo with 270+ species and active conservation programs — covers zoology, animal adaptations, and global ecosystems.

Membership booth for the Los Angeles Zoo — entry point to a major AZA-accredited zoo with strong wildlife conservation and zoology programming.

AZA-accredited zoo with strong conservation programming covering wildlife biology, endangered species, and global ecosystem diversity.