Classified for credit

Museum on the former Gadsden's Wharf slave-trade site — covers African diaspora history, the transatlantic slave trade, and African American contributions to US history.

Museum at the Woolworth lunch counter sit-in site — covers the Civil Rights Movement, nonviolent protest, and 20th-century American social history.

Comprehensive WWII artifact and document museum — covers global military history, the Holocaust, and the political geography of the Second World War.

Immersive museum covering Cold War and modern intelligence operations — addresses 20th-century history, cryptography, surveillance technology, and geopolitics.

Decommissioned aircraft carrier with aircraft, submarine, and space shuttle exhibits — naval engineering, aerospace history, and Cold War civics.

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.

Living-history museum recreating the 1607 English settlement, Powhatan village, and colonial ships — covers early American colonization and Anglo-Algonquian contact.

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.

NASA/Caltech facility managing robotic spacecraft missions — covers aerospace engineering, planetary science, and space exploration.

Third-longest cave in the world with ranger-led tours — covers speleology, geology, cave formation, and Black Hills ecology.

National Monument with exposed fossil beds spanning 45 million years — covers paleontology, stratigraphy, geologic time, and Pacific Northwest natural history.

National Monument fossil beds visitor center with paleontology exhibits covering Eocene–Miocene mammal evolution and Oregon's volcanic geology.

NPS fossil site with visitor center and exposed Cenozoic fossil beds — covers paleontology, geological time, and Oregon prehistory.

NASA visitor center with full-scale rockets, mission-control history, and active launch-site proximity — aerospace engineering and space science.

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.

Full-scale Saturn V moon rocket displayed at Johnson Space Center — rocket propulsion, aerospace engineering, and Apollo program history.

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

Space-science museum in Hutchinson, KS with actual Mercury and Apollo hardware — covers rocket propulsion, astronomy, and U.S. space-program history.

NRAO's 27-antenna radio telescope array with a visitor center — covers radio astronomy, electromagnetic spectrum, and the engineering of large-scale scientific instruments.

Living cave with guided tours through calcite speleothems — covers cave geology, speleothem formation, and karst hydrology.

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