Classified for credit

Aquarium exhibit at SeaWorld featuring manta rays and marine life — marine biology, adaptations, and ocean ecosystem science.

Iowa state park with 13 developed limestone caves — covers karst geology, speleology, cave ecosystems, and physical geography through self-guided and ranger programs.

Iowa state park with 13 mapped caves — geology, speleology, and karst landform study with self-guided trails.

Historic working observatory honoring astronomer Maria Mitchell — covers observational astronomy, telescope use, and the history of women in science.

Marine mammal rescue and rehabilitation facility — covers marine mammal biology, veterinary science, and coastal conservation.

Marine mammal exhibit at the National Aquarium — covers cetacean biology, marine mammal physiology, and conservation science.

Marine science center at Ponce Inlet with touch tanks and estuary exhibits — covers Atlantic coastal ecology, sea turtle biology, and Florida marine ecosystems.

Museum at the C.F. Martin Guitar factory covering instrument-making history, acoustic science, and American craft manufacturing since 1833.

Marine science aquarium operated by a community college — features Puget Sound marine life, touch tanks, and exhibits on Pacific Northwest aquatic ecosystems.

State historic site preserving a mastodon excavation — covers Pleistocene paleontology, Ice Age megafauna, and the archaeological record of early human presence in Missouri.

University-affiliated math and science enrichment center — hands-on STEM exhibits covering mathematics, physics, and applied sciences.

Maui aquarium featuring native Hawaiian marine life — covers Pacific Ocean ecology, coral reef biology, and local conservation.

Mid-mountain staging area for Mauna Kea observatories — covers astronomy, high-altitude meteorology, and Hawaii's unique volcanic and dark-sky environment.

Maunakea mid-level visitor station at 9,200 ft — covers astronomy, atmospheric science, and the world's largest telescope complex.

Dark-sky park and observatory complex in the Blue Ridge Mountains — covers astronomy, light pollution science, and observation of deep-sky objects.

University of Tennessee natural history and archaeology museum — covers paleontology, anthropology, regional geology, and Indigenous cultures of the Southeast.

State park centered on a restored 19th-century grist mill — covers water-powered milling mechanics, geology of Slippery Rock Gorge, and industrial history.

Museum inside a working Chicago River lift bridge — covers hydraulic engineering, bridge mechanics, and the role of the river in urban development.

World's largest lepidopterology collection housed at the Florida Museum of Natural History — covers butterfly taxonomy, biodiversity, and specimen science.

Hands-on science center with IMAX theater — covers physics, earth science, biology, and large-format science film programming.

Memphis museum combining natural history and science exhibits — covers paleontology, regional natural history, and physical science in a hands-on setting.

Commercially guided cave tour through Ozark caverns — covers speleology, karst geology, stalactite/stalagmite formation, and cave ecology.

Mercedes-Benz factory visitor center covering automotive manufacturing, robotics, and industrial engineering on an active US assembly campus.

Riverboat on the Illinois River offering ecological cruises covering freshwater biology, river hydrology, and watershed geography of the upper Mississippi system.