Sault Ste. Marie is a city in Ontario, Canada, located on the St. Marys River. It is the oldest city in the province and was founded in 1668 by French missionaries. The name Sault Ste. Marie is derived from the French words sault, meaning 'RAPIDS, ' and Ste. Marie, meaning 'Saint Mary.' The city is known for its rich history and culture, as well as its natural beauty. It is also home to the world's largest international border crossing between Canada and the United States.