This is meant to complement today's Futility Closet entry titled "Oops". Most folk will assume that the article's photograph (it was subsequently removed) was of the so-called Fort Blunder, the misplaced 1816 incomplete fortification. It was not. The photo was of Fort Montgomery. Wikipedia suggests that the construction of Fort Blunder "stopped and the site was abandoned. Much of its material was scavenged by the locals for use in their own homes and public buildings."
Curious about Fort Blunder's actual location, I screen-grabbed this Google Earth image. Assuming that the first fort was on the same side of Lake Champlain as Fort Montgomery, Rue Martin would be 1.2 km north of the 45th parallel, which is the suggested location.