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Maine
Place City
Colonial Pemaquid State Historic Site Bristol Includes unearthed remnants of Fort William Henry and Fort Frederick.
Fort George Castine Built by the British in 1789 and location of the largest American amphibious operation of the war.
Montpelier – The General Henry Knox Museum Thomaston Built in 1794, Montpelier was constructed as the retirement home of Henry and Lucy Knox, and was in use by the family until 1854; it was razed in 1871. The current Montpelier is a recreation built in 1930 and includes some of Knox’s personal effects.
Sayward-Wheeler House York Harbor Well-preserved home of Jonathan Sayward, a merchant and a loyalist, originally built in 1718 and then enlarged.

But what set [Baron von] Steuben apart from his contemporaries was his schooling under Frederick the Great, Prince Henry, and a dozen other general officers. He had learned from the best soldiers in the world how to gather and assess intelligence, how to read and exploit terrain, how to plan marches, camps, battles and entire campaigns. He gleaned more from his seventeen years in the Prussian military than most professional soldiers would in a lifetime. In the Seven Years’ War alone, he built up a record of professional education that none of his future comrades in the Continental Army — Horatio Gates, Charles Lee, the Baron Johann de Kalb, and Lafayette included — could match.

Paul Lockhart
The Drillmaster of Valley Forge: The Baron de Steuben and the Making of the American Army (2008)