Lake Superior islands include Madeline Island in the state of Wisconsin, Michipicoten Island in the province of Ontario, and Grand Island (the location of the Grand Island National Recreation Area) in the state of Michigan. The larger cities on Lake Superior include the twin ports of Duluth, Minnesota and Superior, Wisconsin; Thunder Bay, Ontario; Marquette, Michigan; and the twin cities of Sault Ste. Marie, Michigan, and Sault Ste. Marie, Ontario. Duluth-Superior, at the western end of Lake Superior, is the most inland point on the St. Lawrence Seaway and the most inland port in the world. Among the scenic places on the
Duluth, Minnesota surfer Mark Anderson from St. Paul described the Duluth surfing experience as "...standing in the snow, jumping off of an ice-covered rock into Lake Superior to go catch waves that any surfer anywhere in the world, pro or beginner, would envy." Erik Wilkie, a surfer originally from California interviewed by MPR, remarked that while Lake Superior surfing may look easy, it can be dangerous. "There's the ice-cold freshwater, which is not as buoyant as saltwater. Lake waves also appear every five seconds or so, much faster than those in the ocean. If you take off on the first or second