While walking along the shoreline of Reeves Beach you will come to what appears to be the ruins of an old pier or dock. Upon closer inspection, it looks more like the ruins of an old ship. If you stumbled upon these ruins and thought it was an old ship, you are close. A sudden storm, in 1957, tore apart a train of barges and pontoons being towed by two tug boats. The barges wound up all over the north shore, some being sunk to avoid becoming navigational hazards. They were carrying dredging equipment to Stony Brook. What you are seeing is the ruins of some of the barges.
To see the barge ruins, park by the gazebo at the north end of Park Ave in Riverhead, walk to the shore, then proceed west for 2000 feet. You can't miss them.