The fort has the kind of wacky pedigree that might tantalize a history buff buyer. A previous fort built in 1816 on the same site was enough to launch a thousand face-palms: Because the engineers were a little murky on exactly where the border fell, a precursor meant to fortify the U.S. against northern invasion accidentally went up on the Canadian side. As James Millard, a historian who literally wrote the book on the moldering remains, has noted, that structure earned the nickname Fort Blunder. The highly visible, expensive mistake was eventually abandoned and plundered. Then, when the
international border was redrawn in the 1840s, positioning the island in U.S. waters, Fort Montgomery went up in the footprint of the folly.
