Classified for credit

Ohio River fossil beds with interpretive center — covers paleontology, Devonian-era marine fossils, and river geology in a hands-on outdoor setting.

Educational wildlife park with hands-on interaction with native Wisconsin animals, covering mammal biology and wildlife conservation.

Site of Washington's first inauguration and early US Congress — primary-source civics, constitutional history, and the founding of federal government.

Barrier island national seashore with ranger programs covering coastal ecology, barrier-island geology, and Atlantic shoreline ecosystems.

Home of the reconstructed US Brig Niagara — covers War of 1812 naval history, 19th-century sailing technology, and Great Lakes maritime heritage.

National memorial to the 40 passengers who thwarted the 9/11 hijacking — covers modern U.S. history, civic courage, and primary-source analysis.

Interactive discovery center focused on the Flint Hills tallgrass prairie ecosystem — ecology, geology, and Great Plains natural history.

Florida's only dry caverns with guided tours — covers speleology, geology, and karst formation in a rare limestone cave system.

Major natural history museum with extensive fossil, archaeology, and butterfly collections — covers paleontology, Florida ecology, and pre-Columbian archaeology.

National Monument preserving 34-million-year-old fossil beds — covers paleontology, stratigraphy, and volcanic geology through ranger programs and fossil walks.

Harvard Art Museums' Fogg collection spans Western art from the Middle Ages to present — supports art history, art criticism, and visual culture study.

NPS reconstructed fort marks the Lewis and Clark Expedition's 1805–06 winter quarters — covers westward exploration, Corps of Discovery, and Pacific Northwest history.

Preserved frontier Army post illustrating post-Civil War military history, Buffalo Soldiers, and westward expansion in the Trans-Pecos.

Civil War-era island fort used as a prison camp — covers Union military engineering, prisoner-of-war conditions, and Delaware Bay history.

Civil War battlefield where Union forces captured a Confederate fort in 1862 — NPS ranger programs cover military strategy and the western theater of the war.

NPS-managed frontier Army fort on the Oregon Trail — covers westward expansion, U.S.-Native relations, and 19th-century military life.

Preserved 1860s frontier Army fort on the Santa Fe Trail — covers Plains Indian conflicts, westward expansion, and military history.

NPS fort site accessible by boat tour — Spanish colonial military history, the 1740 Matanzas Inlet massacre, and 18th-century coastal defense.

Star-shaped 1812-era fort where the bombardment that inspired the national anthem took place — War of 1812 and U.S. civic history.

Reconstructed 18th-century French and British fur-trade fort with living-history interpreters — colonial conflict, Great Lakes trade networks, and frontier life.

National monument preserving one of the oldest continuously active US Army posts — covers Civil War, Reconstruction, and coastal defense history.

NPS-managed Civil War–era brick fort beneath the Golden Gate — covers coastal defense history, military engineering, and the Civil War.

Civil War-era masonry fort where Union rifled artillery breached brick walls — covers military engineering, Civil War history, and coastal fortification design.

Preserved 1840s frontier military fort with restored buildings and ranger programs covering pre-Civil War U.S. expansion and military history.