Classified for credit

Maine museum preserving hunting, fishing, and trapping heritage — covers natural-resource history, wildlife management, and Rangeley Lakes regional history.

Coastal Maine state park with lighthouse access and rocky shoreline — supports marine ecology, coastal geography, and Maine history.

University of Maine agricultural history museum covering 19th–20th century farm equipment, rural economics, and land-use history.

Museum in Patten, ME documenting Maine's 19th-century logging industry with tools, camps, and equipment — covers forest industry history and early mechanical engineering.

Maine state park on Sebec Lake with forested hiking trails covering northern woodland ecology, glacial geology, and freshwater biology.

Museum dedicated to Peary and MacMillan Arctic expeditions — covers polar exploration history, navigation, and Arctic geography.

Maine maritime museum in Searsport covering the Age of Sail, shipbuilding trades, and the social history of a 19th-century seafaring community.

Cable-stayed bridge with a publicly accessible observatory tower — covers structural engineering, cable-tension physics, and Penobscot River geography.

Scarborough land trust preserve with trails — field study of coastal Maine ecology, plant communities, and conservation practices.

Maine coastal state park with beach, dunes, and estuary — covers coastal geology, intertidal ecology, and barrier-beach landform processes.

1807 maritime signal tower with original optics — covers navigation, coastal communication technology, and 19th-century marine engineering.

Coastal wildlife refuge named for marine biologist Rachel Carson — salt marsh ecology, migratory shorebirds, and Atlantic coastal zone biology.

Maine state park with pond swimming, hiking, and natural area — supports outdoor education, freshwater ecology, and physical education.

Maine state park beach on Rangeley Lake — supports ecology, freshwater biology, and outdoor PE in a remote northern forest setting.

Community observatory in western Maine open for public stargazing sessions — practical astronomy, telescope optics, and celestial observation.

FDR's summer home on Campobello Island — covers early 20th-century political history, the New Deal era, and US-Canada relations.

Maine coastal state park with freshwater pond, saltwater beach, and tidal cobble — covers coastal geomorphology, marine ecology, and habitat diversity.

Museum preserving murals and inventions of 19th-century folk artist Rufus Porter — bridges American folk art history and early mechanical ingenuity.

Rare Atlantic white cedar peatland preserve in Saco, ME with boardwalk trail — covers bog ecology, peat formation, and rare plant communities.

Museum covering Maine's maritime heritage with sailing and steam vessel artifacts — supports naval history, mechanical engineering, and coastal trade history.

NPS international historic site marking the 1604 French settlement — covers early European colonization, U.S.-Canada border history, and cross-cultural contact.

Narrow-gauge heritage railroad preserving Maine's 2-foot rail history — covers railroad engineering history and 19th-century transportation.

Audubon-managed tidal marsh with canoe trails and naturalist programs — covers estuarine ecology, bird identification, and coastal geography.

Maine Audubon wildlife sanctuary on the Scarborough River estuary — migratory bird ecology, tidal wetland biology, and coastal habitat study.