Classified for credit

Paleontology research institute and fossil museum in the Black Hills — vertebrate paleontology, fossil preparation, and geological history.

Interactive gold and silver mining museum with simulated mine shaft — covers geology, ore extraction, and Black Hills mining history.

Large national forest encompassing Black Hills ecology, ponderosa pine habitat, and mixed geology — supports botany, geology, and outdoor education.

Private outdoor petrified forest with guided tours — covers paleobotany, fossilization processes, and Black Hills geology.

Private sanctuary protecting wild mustangs in the Black Hills — covers equine biology, Native American horse culture, and Great Plains wildlife conservation.

Oklahoma's highest point in Black Mesa country with mesa geology, fossils, and shortgrass prairie — covers Great Plains geography, stratigraphy, and High Plains ecology.

Vintage steam and diesel excursion railroad in rural New Jersey — 19th–20th-century railroad history, steam mechanics, and regional transportation geography.

NHP preserving the cradle of the American Industrial Revolution — water-powered textile mills cover early manufacturing, labor history, and engineering.

West Virginia state park anchored by a 65-foot waterfall in a mixed hardwood canyon — geology, forest ecology, and watershed study with developed trails.

AZA-accredited zoo in Des Moines with conservation programming — supports zoology, animal biology, and wildlife conservation curricula.

University art museum at UT Austin with a substantial permanent collection spanning antiquities through contemporary art — supports formal art history curriculum.

Restored Federal-era mansion on a Kanawha River island, accessible by ferry — covers early American political history, Aaron Burr's conspiracy, and frontier settlement.

Historic 33-acre estate with formal gardens, arboretum, and Rhode Island botanical collections — supports dendrology, horticulture, and 19th-century estate history.

Formal and wild garden reserve on Bainbridge Island featuring diverse ecosystems — supports plant ecology, landscape design, and Pacific Northwest biodiversity study.

Ice cream factory tour showing dairy processing, pasteurization, and industrial food production from raw ingredients to packaged product.

Blue Bell ice cream factory tour showing commercial dairy processing, pasteurization, and food-production quality control.

Coastal marine science center on the NH seacoast with interactive exhibits on ocean biology, tidal ecology, and Gulf of Maine conservation.

Working Victorian-era millworks and living-history village — covers woodworking machinery, gingerbread architecture, and 19th-century trades.

469-mile scenic parkway through the Appalachians offering geology, forest ecology, and Appalachian cultural history via ranger programs and visitor centers.

Excursion train through the Blue Ridge Mountains on a historic railway route — covers Appalachian railroad history and regional geography.

Trail through Natural Bridge State Park — karst geology, Appalachian forest ecology, and Virginia's iconic natural limestone arch.

Florida state park on the St. Johns River with a first-magnitude spring — supports freshwater ecology, manatee biology, and Florida karst geology study.

Mississippi safari-style animal park — introduces zoology, animal behavior, and conservation through close-encounter viewing.

Indoor aquarium featuring freshwater and marine species — covers aquatic biology, ecosystems, and animal adaptations.