Minnesota became the 32nd state of the union on May 11, 1858. A small extension of the northern boundary makes it the most northerly of the 48 conterminous U.S. states. (This peculiar protrusion is the result of a boundary agreement with Great Britain before the area had been carefully surveyed.) Minnesota is bounded by the Canadian provinces of Manitoba and Ontario to the north, by Lake Superior and Wisconsin to the east, by Iowa to the south and South Dakota and North Dakota to the west. Minnesota is the home of the Mall of America, which holds more than 400 stores and attracts nearly 40 million people a year.