Classified for credit

Discovery center on Little Seneca Lake offering ranger programs on local ecology, wetlands, and watershed science.

Regional park with lake, wetlands, and trails — supports ecology, wildlife observation, and outdoor PE alongside ranger programming.

Chesapeake Bay estuary NWR with trails and observation areas — covers wetland ecology, migratory bird biology, and conservation of tidal marshes.

National Wildlife Refuge visitor center on the Chesapeake watershed — covers wetland ecology, migratory bird biology, and Chesapeake Bay conservation.

Brookside Gardens conservatories with tropical and warm-temperate plant collections — covers plant adaptation, horticulture, and ecosystem diversity.

County nature center with live animal exhibits and woodland trails — supports local ecology, wildlife biology, and environmental science.

Large Maryland-National Capital regional park with nature center, trails, and a small zoo — covers suburban woodland ecology and wildlife observation.

Baltimore nature center with wildlife rehabilitation and live animal exhibits — covers local ecology, animal biology, and conservation.

Natural waterfall along a creek trail in the Patapsco Valley area — fluvial geomorphology, stream ecology, and Maryland natural history.

Maryland stream-corridor park with nature center programming — stream macroinvertebrate biology, Piedmont ecology, and watershed science.

Private wildlife preserve with native and exotic animals — applied zoology, wildlife conservation, and animal behavior observation.

Maryland state forest with managed pine and mixed hardwood stands — supports forestry, ecology, and biodiversity field study with self-guided trails.

Maryland state park on the Port Tobacco River estuary — covers Chesapeake watershed ecology, tidal biology, and colonial-era settlement geography.

Home of Charles Carroll, sole Catholic signer of the Declaration of Independence — covers colonial-era political history and religious freedom.

Chesapeake Bay wetlands education center with trails and wildlife observation — covers estuarine ecology, migratory birds, and Chesapeake Bay conservation.

18th-century Chesapeake port town with intact colonial streetscape — covers Colonial-era trade, the Revolutionary period, and Maryland civic history.

Colonial-era Chesapeake River town with 18th-century streetscapes, historic churches, and the Custom House — covers colonial Maryland commerce and port history.

Dedicated museum examining Civil War-era medicine, surgery, and field hospital practices — bridges history and the history of medical science.

National Historic Site preserving Clara Barton's home — covers Civil War nursing, Red Cross founding, and 19th-century women's history.

County nature center with trails, live animals, and environmental education programs — covers local ecology, native species, and watershed biology.

Walkable colonial-era district with preserved 18th-century architecture — covers Maryland colonial history, American Revolution, and civic geography.

Baltimore-area nature park with stream valleys, woodland trails, and environmental education programs covering Mid-Atlantic ecology.

City-operated nature center with live animals, exhibits, and creek trails — covers local wildlife biology, watershed ecology, and environmental science.

Maryland state park featuring a 78-foot cascading waterfall — geomorphology, freshwater ecology, forest biology, and trail-based physical education.