Classified for credit

19th-century coastal fortification with guided tours covering military engineering, naval history, and America's Cup heritage.

Restored 19th-century coastal fortification in Newport — covers military engineering, coastal defense history, and the War of 1812 through WWII eras.

UNESCO World Heritage Hopewell Culture earthworks — covers Native American archaeology, pre-Columbian engineering, and Ohio Valley anthropology.

Reconstructed 1775 frontier fort — Daniel Boone, Kentucky settlement, and frontier life.

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

19th-century brick fort with living-history reenactors — covers Civil War coastal defense, military engineering, and Florida territorial history.

19th-century coastal fort with living-history programs and natural beach habitat — covers Civil War-era fortification engineering and coastal ecology.

Well-preserved frontier fort with original buildings and museum — covers post-Civil War Army history, Buffalo Soldiers, and westward expansion.

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 Union prison — covers fortification design, prisoner-of-war conditions, and Delaware River military history.

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

Civil War–era fort on a Delaware River island — covers prisoner-of-war history, Civil War military operations, and mid-Atlantic geography.

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 visitor center and battlefield covering the 1862 Union capture of Fort Donelson — a pivotal Western Theater Civil War engagement.

French and Indian War-era stone fort with preserved earthworks and living-history programs — covers 18th-century colonial warfare and frontier diplomacy.

Massive antebellum masonry fort on a remote Gulf island — covers Civil War coastal defense, military engineering, and Dr. Mudd's imprisonment.

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.

Reconstructed French and Indian War fort with museum — covers 18th-century colonial warfare, frontier strategy, and Pennsylvania settlement.

Reconstructed 18th-century British fort on the Little Tennessee River covering colonial-era diplomacy, Cherokee relations, and French and Indian War history.

Restored 1780s British fort on Mackinac Island with costumed soldiers — covers frontier military history and the Great Lakes fur trade era.

Restored Civil War coastal fort within a state park — covers 19th-century fortification engineering, coastal geography, and military history alongside barrier-island ecology.

Reconstructed Lewis and Clark winter fort — covers the 1804–05 Corps of Discovery expedition, Native history, and westward exploration.

Civil War-era coastal fort on Ship Island accessible by ferry — covers Union blockade strategy, coastal fortification design, and Gulf Coast military history.