Classified for credit

Frank Lloyd Wright's Fallingwater is a National Historic Landmark illustrating organic architecture, engineering design principles, and 20th-century design history.

Civil War battlefield with NPS visitor center, cyclorama, and ranger-led programs — covers military strategy, the turning point of the war, and Reconstruction.

UNESCO World Heritage Site where the Declaration of Independence and Constitution were debated and adopted — primary-source American founding history and civics.

NPS-managed park preserving Independence Hall, Liberty Bell, and core sites of American founding — primary-source Constitutional history.

Major museum in Philadelphia with immersive exhibits on the American Revolution — primary-source history, civics, and the founding era.

NPS site with a working roundhouse and restored steam locomotives — covers railroad history, steam-engine mechanics, and industrial-era social history.

Preserved narrow-gauge railroad with operating steam locomotives — covers 19th-century industrial history, rail engineering, and Appalachian heritage.

Eisenhower's retirement home and working farm in Gettysburg — covers WWII leadership, Cold War presidency, and 1950s American political history.

Maritime museum on Presque Isle Bay featuring the brig Niagara — covers naval history of the War of 1812, ship construction, and Great Lakes commerce.

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.

Restored 18th-century iron furnace complex with living-history demonstrations covering colonial iron production, industrial history, and metallurgy.

National memorial at the site of the 1889 Johnstown Flood — covers disaster history, dam engineering failure, civil engineering, and 19th-century industrial community life.

Henry Mercer's concrete castle housing pre-industrial tools and trades — early American craft history, archaeology, and material culture.

Thirty decorated classrooms at the University of Pittsburgh representing world cultures — covers world history, immigration, architecture, and cultural geography.

Preserved electric streetcar collection with operating rides — covers transit history, electrification, and urban development.

Operating electric trolley museum with vintage streetcar rides — covers transportation history and early electric rail technology.

Gettysburg-based Civil War history tour operator offering guided experiences at the battlefield — primary-source military history and Reconstruction-era civics.

Revolutionary War encampment site with visitor center, preserved earthworks, and ranger programs — covers Continental Army history and the 1777–78 winter campaign.

Visitor center for Valley Forge National Historical Park — Revolutionary War winter encampment, Continental Army history, and founding-era civics.

Restored 18th-century apothecary in Moravian Bethlehem — covers colonial medicine, botany, and early pharmacy practice.

NPS site preserving the Allegheny Portage Railroad — covers 19th-century engineering, canal-era transportation history, and westward expansion.

Living-history and film experience introducing Amish culture, faith, and Plain community traditions in Lancaster County, Pennsylvania.

Motorsports history museum covering racing technology and speedway heritage — supports mechanical engineering history and regional sports culture studies.