The Thunder Bay National Marine Sanctuary is part of a system of underwater reserves around the country. They’re like national parks, but below the surface.The Thunder Bay National Marine Sanctuary is part of a system of underwater reserves around the country. They’re like national parks, but below the surface.Lakes, Oceans and Seas, Shipwrecks (Historic), Travel and Vacations, Parks and Other Recreation Areas, National Parks, Monuments and Seashores, National Oceanic and Atmospheric Administration, Lake Michigan, National Marine SanctuariesRead More
