Ontario is a province located in the central part of Canada, the largest by population and second largest, after Quebec, in total area. Ontario is bordered by the provinces of Manitoba to the west, Quebec to the east, and the states of Michigan, New York, and Minnesota.
Most of Ontario's borders with the United States are natural, starting at the Lake of the Woods and continuing through the four Great Lakes: Superior, Huron (which includes Georgian Bay), Erie, and Ontario (for which the province is named), then along the Saint Lawrence River near Cornwall.
The most well-known geographic feature is Niagara Falls, part of the much more extensive Niagara Escarpment. The Saint Lawrence Seaway allows navigation to and from the Atlantic Ocean as far inland as Thunder Bay in Northwestern Ontario. Tourism contributes heavily to the economy of Central Ontario, peaking during the summer months owing to the abundance of fresh water recreation and wilderness found there in reasonable proximity to the major urban centres. At other times of the year, hunting, skiing and snowmobiling are among the out of high-season draws. This region has some of the most vibrant fall colour displays anywhere on the continent and tours directed at overseas visitors are organized to see them. Tourism also plays a key role in border cities with large casinos, among them Windsor, Rama, and Niagara Falls which attract many US visitors.