| | Ontario Cottage Rentals & Cabin Rental, Cottage Canada - USA |
 | | Ontario can be divided into three major natural regions: the Canadian Shield (also known as the Laurentian Plateau), which cuts a wide swath across the center of the province; the Hudson Bay Lowlands to the north; and the Great Lakes and St. Lawrence Lowlands, which form the southernmost region. |
 | | The Hudson Bay Lowlands in the north sit atop sedimentary rocks, mainly limestone, and dip gently northward from the Canadian Shield toward the shore of Hudson Bay. |
 | | The most notable topographical feature of the Great Lakes Lowlands is the Niagara Escarpment, a high ridge of limestone cliffs that runs about 400 km (250 mi), north from Niagara Falls through the Bruce Peninsula to the Manitoulin Islands in Lake Huron. |
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