"Monkey Island", the name that is traditionally assigned to relatively small islands in the inland water lakes of Wisconsin . The origin of the name relates back to the cement island that monkeys inhabitated in the Vilas Park Zoo in Madison, Wisconsin. The island was surrounded by a water that featured seals. The small island visible as state highway 51 crosses the Manitowish chain of lakes (across from Greer's pier) is the original monkey island, so-named in the 1960s during trips to the old gangster hideout, Little Bohemia, of John Dillinger shoot-out fame.
"Monkey Island", a nautical term for a ship's upper bridge; see Brass Monkey