This anchor is on the lawn of the visitor center along the lakeshore.
From the adjoining plaque: 1892, This conventional ship anchor from the whaleback steamer Thomas Wilson, sunk a half mile outside the Duluth Piers. Recovered in 1973 by the USCC Cutter Woodrush with divers Elmer Engman, Dave Anderson, Dan Gomsn, and Paul Von Goertz.
The anchor weighs a ton and 1/2.
You can read more about the Thomas Wilson HERE.