America's greatest museum of our past as a seafaring nation lies on the bottom of the sea and lakes in the National Marine Sanctuaries. Prehistoric sites, shipwrecks, and naval battlefields are protected by sanctuaries. They are places to explore, discover and appreciate our country's maritime cultural heritage. That heritage is a legacy of thousands of years of settlement, exploration, immigration, harvesting the bounty of the seas, and creating coastal communities and maritime traditions. Through the study, protection and promotion of this diverse legacy, sanctuaries help Americans learn more about our past. Click here to learn more!