Classified for credit

Living-history railway village museum with operating narrow-gauge steam train and restored historic buildings — covers railroad technology history and 19th-century New England life.

Working shipyard museum in Bath covering wooden and iron shipbuilding history — combines maritime history with naval architecture and engineering.

State museum covering Maine's natural, cultural, and industrial history — strong hooks for geology, maritime history, and Maine's role in American industry.

Living-history farm museum in NH covering 18th–19th century agricultural practices, animal husbandry, and rural New England life.

World's largest electric railway museum with 250+ restored trolleys — transportation history, electric traction engineering, and 20th-century urban transit.

Living-history ice-harvesting museum demonstrating 19th-century ice-cutting tools, cold-storage technology, and the pre-refrigeration New England economy.

Maine living-history center on a working farm with 19th-century programming — covers Civil War era, farm life, and New England history.

Narrow-gauge heritage railway museum with restored equipment and operating trains — covers railroad engineering history and Maine's lumber-transport economy.

Preserved 19th-century living-history village — covers rural Maine daily life, period crafts, and early American social history.

Museum dedicated to the history and culture of the Wabanaki peoples of Maine — Indigenous history, archaeology, and living culture.

Living-history Acadian village in northern Maine — covers French-Canadian settlement, Acadian culture, and 19th-century rural life.

WWII-era concrete coastal artillery battery on Peaks Island — covers coastal defense strategy, military engineering, and the U.S. home-front war effort.

Heritage excursion railroad on a historic Maine rail line — covers 19th-century railroad history, rural Maine economy, and the role of rail in regional development.

19th-century commercial building turned local history museum covering Maine maritime trade and Kennebunk community heritage.

Victorian-era mansion preserved with original furnishings by Historic New England — 19th-century domestic life and Maine merchant-class history.

17th-century colonial settlement and fort site on the Maine coast — early European colonization, archaeology, and colonial-era history.

Museum dedicated to Deer Isle's granite quarrying industry — covers geology, industrial history, and 19th-century stone-cutting technology.

Island home of Arctic explorer Admiral Robert Peary — accessible by boat, covers polar exploration history and early 20th-century maritime geography.

Historic home associated with the Farnsworth Art Museum in Rockland — covers Maine history, the Wyeth artistic legacy, and 19th-century domestic life.

Civil War regimental museum on Peaks Island honoring the Fifth Maine Infantry — Union Army service, soldier life, and Reconstruction history.

Spanish-American War coastal artillery fort — covers early 20th-century military fortification, coastal defense strategy, and Maine maritime history.

Early American blockhouse fort on the Sheepscot River covering post-Revolutionary coastal defense and early Maine territorial history.

Well-preserved Civil War–era granite fort on the Penobscot River — covers 19th-century military engineering, coastal defense strategy, and Maine history.

Early 19th-century coastal fort in Castine, Maine — supports War of 1812 and early American military history in the District of Maine.