Classified for credit

Gemini North base facility in Hilo offering public tours of the support center for one of the world's largest optical telescopes — covers observational astronomy and telescope engineering.

IA state park known for geode-collecting on the creek — mineralogy and southeast-Iowa geology.

University of Wyoming geology museum with dinosaur specimens and mineral collections — covers paleontology, stratigraphy, and regional Rocky Mountain geology.

Historic estate and museum dedicated to photography's invention and evolution — covers optics, chemistry, and visual communication history.

Presidential library and museum covering George H.W. Bush's presidency — Cold War history, foreign policy, and U.S. government civics.

Public observatory in Brazos Bend State Park with 36-inch telescope and viewing nights — covers astronomy, optics, and celestial mechanics.

NPS-managed birthplace of George Washington with reconstructed colonial farm — covers colonial-era history, plantation agriculture, and early American biography.

National monument at George Washington Carver's birthplace covering his life, agricultural science research, and contributions to botany and chemistry.

Restored home of Founding Father George Wythe in Colonial Williamsburg — covers colonial legal history, the American Revolution, and 18th-century domestic life.

Narrow-gauge heritage railroad through the Rocky Mountains — covers 19th-century mining-era history, railroad engineering, and Colorado geography.

Museum dedicated to Georgia O'Keeffe's life and work — covers American Modernism, color theory, and the relationship between art and the New Mexico landscape.

Drive-through safari conservation park with African and exotic wildlife — covers zoology, conservation biology, and animal behavior.

Sea turtle rehabilitation and research center on Jekyll Island, GA — covers marine biology, sea turtle life cycles, conservation medicine, and coastal ecology.

University natural history museum featuring a Cretaceous mosasaur fossil and Georgia wildlife specimens — paleontology, regional ecology, and natural history.

Restored 19th-century railroad complex with working equipment and guided tours — covers railroad history, industrial development, and transportation engineering.

Site of Gen. Robert E. Lee's headquarters during the Battle of Gettysburg — primary-source Civil War command history and battlefield geography.

Gettysburg museum and visitor center adjacent to the battlefield — covers Civil War tactics, turning-point analysis, and the significance of the Gettysburg Address.

Living-history reenactment field near Gettysburg — reinforces Civil War tactics, battlefield geography, and primary-source military history.

Working ranch and education center in Ghost Ranch country — features fossil beds (including Coelophysis), geology hikes, and paleontology programs.

Southern Illinois state park with dramatic sandstone formations and old-growth forest — geology, plant ecology, and outdoor education.

Gibbs Farm living-history site near St. Paul depicting 1800s Dakota and pioneer farm life through hands-on demonstrations.

Extensive private botanical garden in north Georgia — covers plant taxonomy, horticulture, and seasonal ecological cycles.

NPS-preserved 13th-century Mogollon cliff dwellings — covers pre-Columbian Indigenous architecture, archaeology, and Southwestern cultural history.

Hands-on children's museum in Salem — interactive exhibits cover early literacy, basic math, and introductory science concepts.