MICHAEL P. GADOMSKI / SCIENCE PHOTO LIBRARY MICHAEL P. GADOMSKI / SCIENCE PHOTO LIBRARY
Lena Island, seen from the Shoreline Centennial Trail in Charleston Lake Provincial Park, Ontario, Canada, in summer. Charleston Lake is part of the Frontenac Arch, a southern extension of the Canadian Shield that links the northern boreal forests with the Adirondacks and Appalachians. The Frontenac Arch area is now a UNESCO World Biosphere Reserve.
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