Grecian Wreck (Thunder Bay National Marine Sanctuary)

The Grecian, a 296-ft steel bulk freighter launched in 1891, sank in 1906 while under tow after a collision and now lies in roughly 100 ft of water in Thunder Bay National Marine Sanctuary off Alpena. The deck is reached around 75 ft, and divers can explore the triple-expansion engine, boiler, decks and cargo holds; the collapsing midships section can be disorienting. NOAA typically places mooring buoys on both bow and stern in season.