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.

National seashore barrier island with wild ponies, migratory birds, and tidal ecosystems — coastal ecology, wildlife biology, and conservation.

National seashore barrier island with wild ponies, tidal marshes, and Atlantic beach ecosystems — covers coastal ecology, barrier-island geology, and wildlife biology.

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

Major urban aquarium with multi-story reef, shark exhibit, and dolphin presentations — covers marine biology, oceanography, and animal adaptation.

Major encyclopedic art museum with permanent and rotating exhibits spanning painting, sculpture, and decorative arts across centuries.

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

Major hands-on science center in Baltimore's Inner Harbor — covers physics, astronomy, earth science, and biology through interactive exhibits and an IMAX dome.

NASA Goddard visitor center with exhibits on Earth science, astrophysics, and satellite engineering — active federal research campus.

NASA Goddard visitor center with spacecraft models, Earth science exhibits, and rocket displays — covers astrophysics, Earth observation, and aerospace engineering.

Major urban aquarium on Baltimore's Inner Harbor — covers marine biology, coral reef ecology, and animal adaptation across multiple exhibit floors.

Interactive museum exploring optical illusions, perception, and mind-bending large-scale art installations — bridges visual arts and neuroscience of perception.

Baltimore museum dedicated to self-taught and outsider art — supports study of American folk art traditions, creativity, and social history.

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

Maryland state park headquarters on Assateague Island barrier beach — coastal ecology, wild pony biology, and barrier-island geomorphology.

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

Working family orchard and farm with pick-your-own operations — applied plant biology, agricultural economics, and seasonal food production.

County-operated display gardens with themed garden rooms, a conservatory, and aquatic features — covers botany, horticulture, and plant diversity.

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

Chesapeake Bay state park famous for exposed Miocene fossil beds on the beach — covers paleontology, geology, and Chesapeake Bay ecology.

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

NPS-managed mountain park in the Blue Ridge with ranger programs, trails, and forest ecology — covers Appalachian ecology, geology, and environmental 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.