Washington County, New York is part of the Great Appalachian Valley (also known simply as the 'Great Valley') which is a long narrow valley strip often between tall mountain ranges. The county transitions from the Taconic Mountains to the Adirondack Mountains, and from the Lake Champlain Valley to Hudson River Valley. Much of the county is part of the slate valley of the Upper Taconic Mountains (Taghkanic, meaning 'in the trees'). The eastern boundary of Washington County is the New York–Vermont border, part of which is Lake Champlain. This is also the border with New England proper. The northern end of the county is
Lake Champlain Maritime Museum Lake Champlain Maritime Museum With facilities open to the public May through mid-October, the Lake Champlain Maritime Museum (LCMM) is non-profit museum located in Vergennes, Vermont, USA. Its mission is to preserve and share the history and archaeology of Lake Champlain. As a maritime museum specializing in archaeology, LCMM studies the hundreds of shipwrecks discovered in Lake Champlain and plays a major role in the management of those cultural resources. Through the preservation and interpretation of those and other artifacts, the museum tells the story of the people and culture of the Lake Champlain region. Founded in 1985, the museum