13. Mau Mau Island (Mill Basin)
Islands have historically played strategic roles for nations and their militaries, and those in the New York City are no exception. While the battles on Long Island and Manhattan have been well documented, the naval skirmish that took place on Mau Mau is a little less well-known. That might have had more to do with the post-battle bar hop, though. In 2011, the artist collective Swimming Cities hosted a raucous day of competitive naval events that pitted “gangs” sailing homemade vessels against one another. The manmade island sits across from Marine Park golf course and has attracted little media attention–save for the construction of a bird sanctuary–since.