Thunder Bay National Marine Sanctuary protects some of our nation's best-preserved shipwrecks. These shipwrecks are a living museum, a way for divers, snorkelers, kayakers, and more to get up close to the maritime history of the Great Lakes. In this photo taken by a 360-degree camera, a diver explores the wreck of American Union. This three-masted schooner sank in 1894 after running aground on the rocks at Thompson's Harbor. (Photo: NOAA)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/44124469278@N01">National Marine Sanctuaries</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/onms/38030792615/">American Union Shipwreck</a>