Located on the eastern end of the Upper Peninsula, Sault Ste. Marie is the only location besides Detroit and Port Huron that connects Michigan with Canada. Its twin city, Sault Ste. Marie, Ontario, is separated from it by the St. Marys River and connected by the International Bridge. The town is known for its tourism, which is fueled by the nearby Kewadin Casino as well as the Soo Locks, the world's busiest canal in terms of pure tonnage passing through it. Secondary education needs in the area are met by Lake Superior State University, known for its annual "Banned Words List." In addition, the Soo, as it is known locally, is home of the International 500 Snowmobile Race, which draws participants from all over the U.S. and Canada. Founded by explorer Father Jacques Marquette in 1668, Sault Ste. Marie is the oldest city in Michigan and one of the oldest in the United States.