Sleightsburgh Spit is located in Port Ewen, NY.  It “has been built up over the years on the remains of a 19th century barge graveyard. Wooden canal boats and barges built for the Delaware & Hudson Canal and Hudson River shipping were abandoned near the mouth of Rondout Creek when they had outlived their usefulness.”  The features of the site are best seen at low tide.

More information: Website

Location:  Google Maps (41.920586, -73.972866)