(Connecticut)
The Beckley Furnace Industrial Monument is a state-owned historic site preserving a 19th-century iron-making blast furnace on the north bank of the Blackberry River in the town of North Canaan, Connecticut. The site became a 12-acre (4.9 ha) state park in 1946; it was added to the National Register of Historic Places in 1978. (Ref: https://en.wikipedia.org/wiki/Beckley_Furnace_Industrial_Monument)