Thunder Bay Marine Sanctuary: A Diver's Paradise | Northern Michigan History Explore the Thunder Bay Marine Sanctuary, the first National Marine Sanctuary in the Great Lakes, rich in history and shipwrecks.

On this day in 2000, Thunder Bay became the first National Marine Sanctuary in the Great Lakes—protecting over 100 shipwrecks in “Shipwreck Alley”!
Dive into history here northernmichiganhistory.com/thunder-bay-...
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