The City of Winnipeg is located at the junction of the Red and Assiniboine Rivers, almost at the geographic centre of North America. The name Winnipeg has its origin in the Cree Indian name given to the lake 40 miles north, meaning "Win", muddy, "nipee", water. The city has a fine collection of early twentieth century buildings when it was the gateway to western Canada. The Exchange District is the original site of commerce in Winnipeg was declared a National Historic Site by the federal Minister of Canadian Heritage in 1997. After the railroads came to Winnipeg, this area was developed with many fine warehouses, offices and banks. Many of these remain and are unrivalled in Canada.