Classified for credit

Site of the bloodiest single day in American military history — Civil War tactics, strategy, and the political context of the 1862 Maryland Campaign.

Oldest railroad museum in the US with operating roundhouse and locomotives — covers railroad history, industrial technology, and 19th-century economic development.

NPS site preserving the theater where Lincoln was assassinated — covers Civil War era, presidential history, and Reconstruction with museum exhibits.

Civil War battlefield visitor center with exhibits and ranger programs — covers the 1862 Battle of Antietam and its impact on emancipation policy.

Working-waterfront industrial museum with hands-on exhibits on Baltimore's manufacturing and maritime heritage — covers labor history and mechanical engineering.

Living-history farm interpreting 19th-century African American agricultural life — primary-source social history, slavery, and post-Civil War rural culture.

Living-history farm museum in Maryland covering 19th-century agricultural life — supports farm technology, animal husbandry, rural history, and seasonal crop science.

NPS canal park with towpath trails and restored lock infrastructure — covers 19th-century civil engineering, trade history, and Potomac River ecology.

184-mile historic canal with locks, aqueducts, and mule-powered towpath — covers 19th-century transportation engineering, westward commerce, and Civil War history.

C&O Canal NHP at Great Falls features a working canal lock, towpath, and visitor center — covers 19th-century civil engineering, commerce, and transportation history.

Outdoor and indoor museum documenting Chesapeake Bay skipjack and workboat heritage — covers maritime history, boat-building trades, and Bay ecology.

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

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

Aviation museum on the site of Glenn L. Martin's plant — covers Maryland aviation manufacturing history, aerospace engineering pioneers, and WWII aircraft production.

NPS park preserving Tubman's birthplace landscape and Underground Railroad routes — primary-source abolitionist history, civil rights, and Maryland geography.

Reconstructed 17th-century tobacco port with colonial-era gardens — primary-source history of Chesapeake settlement, trade, and daily colonial life.

Four historic vessels including a Civil War sloop and WWII submarine — covers naval history, ship engineering, and U.S. military history.

Operational WWII Liberty Ship open for tours — covers wartime maritime history, cargo ship engineering, and the homefront economy.

Major Maryland history museum with collections spanning colonial through 20th-century history — supports Maryland state history and US history curriculum.

Oldest continuously operating state capitol in the US and site where Congress ratified the Peace of Paris (1784) — covers constitutional history and civics.

Civil War battlefield where Confederate forces threatened Washington D.C. — ranger-led programs cover military strategy, the war's Eastern Theater, and Maryland's divided loyalties.

NSA-affiliated museum covering cryptology history from ancient ciphers to modern computing — supports math, history of technology, and national security studies.

Museum in Frederick, MD dedicated to Civil War medicine — covers period surgical techniques, public health, and battlefield triage as primary-source history.

Civil War museum at New Market Battlefield site in Virginia — covers the 1864 Shenandoah Valley campaign and VMI cadet involvement in primary-source context.