What's a peninsula?
Peninsula
A peninsula ( from ' "almost” and ' "island") is a landform surrounded by water on the majority of its border while being connected to a mainland from which it extends. The surrounding water is usually understood to be continuous, though not necessarily named as a single body of water. Peninsulas are not always named as such; one can also be a headland, cape, island promontory, bill, point, or spit. A point is generally considered a tapering piece of land projecting into a body of water that is less prominent than a cape. A river which courses through a very tight meander is also sometimes said to form a "peninsula" within the (almost closed) loop of water. In English, the plural versions of peninsula are "peninsulas" and, less commonly, "peninsulae".
Upper Peninsula of Michigan
The Upper Peninsula (UP), also known as Upper Michigan, is the northern of the two major peninsulas that make up the U.S. state of Michigan. The peninsula is bounded on the north by Lake Superior, on the east by the St. Marys River, on the southeast by Lake Michigan and Lake Huron, and on the southwest by Wisconsin. Upper Peninsula counties also include nearby islands such as Grand, Drummond, Mackinac, and Bois Blanc, and more distant Isle Royale.