Classified for credit

Active underground river cave with boat tours — covers karst geology, hydrology, cave ecosystems, and bat biology.

Lost River Gorge features glacially carved flume and boulder caves in NH's White Mountains — covers geology, glaciation, and geomorphology through self-guided tours.

West Virginia state park with karst geology, diverse Appalachian flora, and ranger programs covering ecology and watershed biology.

Guided tour of a West Virginia limestone cavern with large speleothems — covers cave geology, karst formation, and mineral crystallization.

World-class botanical garden in Montecito with rare succulent and cycad collections — plant taxonomy, horticulture, and conservation of endangered plant species.

Preserved home where Louisa May Alcott wrote Little Women — covers 19th-century American literary history, transcendentalism, and the domestic lives of women writers.

Baton Rouge museum combining a planetarium and science exhibits with an art collection — strongest curriculum hook is astronomy and physical science.

Hands-on children's museum with interactive exhibits in science, literacy, and math designed for early childhood learning.

LSU open-air museum with 30+ historic structures depicting Louisiana rural life from 1700s–1900s — covers plantation history, Creole culture, and agricultural heritage.

Reclaimed limestone cavern beneath Louisville repurposed for zip lines and underground tours — covers karst geology, cave formation, and underground ecology.

Factory tour and museum showing how wood-turned baseball bats are manufactured, covering materials science and American sports history.

Working farm and wildlife rehabilitation center in West Michigan offering hands-on exposure to animal care, native species, and agricultural ecology.

National park preserving 19th-century textile mill complex — covers Industrial Revolution, labor history, immigrant experience, and mechanical engineering.

Historic research observatory where Pluto was discovered — covers astronomy, telescope optics, and the history of planetary science.

Historic refracting telescope at Lowell Observatory where Pluto was discovered — covers optics, astronomy history, and planetary science.

Public research-grade 1-meter telescope at Lowell Observatory — covers optics, stellar astronomy, and observational research methods.

Historic Lowell Observatory Perkins Telescope in Flagstaff — covers stellar astronomy, telescope optics, and the history of planetary science.

Wisconsin state riverway protecting 92 miles of the lower Wisconsin River — riparian ecology, river geology, and Midwest watershed systems.

Smithsonian open-storage visible art study center displaying thousands of American works — supports art history, visual analysis, and museum studies.

Climate-controlled conservatory at San Antonio Botanical Garden — covers plant biology, biome diversity, and tropical/desert plant adaptations.

Working farm park with animals, rides, and seasonal crops — livestock biology, plant agriculture, and farm ecosystems for young children.

Large Michigan dune and forest state park on Lake Michigan — covers Great Lakes ecology, dune formation geology, and freshwater coastal biology.

Great Lakes shoreline park with dunes and forest — covers coastal ecology, dune formation, and freshwater biology.

Great Lakes coastal dune climb within a state park — covers dune formation, littoral ecology, and Great Lakes geography.