Classified for credit

Large resort garden complex with native plant collections, butterfly center, and raptor program — covers botany, ecology, and wildlife biology.

NPS visitor center at a major Civil War Union supply base and USCT training site — covers African-American Civil War service and Kentucky Unionist history.

Undeveloped Atlantic barrier-island seashore with ranger programs covering coastal ecology, sea turtle nesting, and estuary biology.

NPS Creole heritage site on the Cane River — covers French Colonial, plantation, and free Creole of color history in Louisiana's antebellum society.

Preserved 18th–19th century Shaker living-history village with working crafts and agricultural demonstrations — religious communal history and period technology.

NPS barrier-island seashore with beaches, marshes, and the Cape Hatteras Lighthouse — coastal ecology, barrier-island geology, and maritime history.

National seashore with barrier islands, lighthouse, and beach ecosystems — covers coastal geology, migratory bird biology, and Outer Banks maritime history.

National seashore on barrier islands covering coastal ecology, tidal processes, and lighthouse history through ranger programs and beach exploration.

Extinct cinder-cone volcano with rim drive and crater trail — covers volcanology, plate tectonics, and geologic landform formation.

NPS-managed home and farm of poet Carl Sandburg — integrates American literary history, biography, and sustainable goat farming on a preserved Blue Ridge homestead.

Nonprofit big-cat sanctuary offering guided tours of rescued tigers, lions, and other wild felines — covers wildlife conservation and exotic-animal welfare.

Living-history farm museum in Maryland covering 19th-century agricultural life — supports farm technology, animal husbandry, rural history, and seasonal crop science.

State park featuring multiple guided cave tours — covers karst geology, speleothem formation, cave ecosystems, and local geography.

Hohokam prehistoric compound ruins with NPS ranger interpretation — covers pre-Columbian archaeology, agriculture, and Sonoran Desert civilizations.

NPS-managed 17th-century Spanish masonry fort — covers colonial-era military history, Spanish colonial policy, and fortification engineering.

Regional science center in Hickory, NC with hands-on STEM exhibits covering physical science, life science, and technology.

NPS-managed mountain park in the Blue Ridge with ranger programs, trails, and forest ecology — covers Appalachian ecology, geology, and environmental science.

Guided tour of a living limestone cave with formations — covers speleology, mineralogy, karst geology, and cave ecology.

Commercial cave tour in the Pikes Peak foothills covering geology, cave formation, stalactites/stalagmites, and karst hydrology.

Commercially operated cave system with extensive speleothem formations — covers geology, mineralogy, and karst formation processes.

High-elevation amphitheater of hoodoos and erosional geology in a national monument — covers geomorphology, stratigraphy, and subalpine ecology.

Research-active archaeological museum at an active dig site on the Illinois River — covers Native American prehistory, field archaeology methods, and stratigraphy.

Regional zoo and botanical gardens with conservation programs covering Florida wildlife, plant biology, and animal ecology.

Battlefield site of the 1815 Battle of New Orleans with visitor center — covers the War of 1812 and early American military and political history.