17. Mill Rock
This was part of the formation that made up Hell Gate, until the US Army Corps of Engineers blew up the the adjoining Flood Rock with what was said to be the largest planned-explosion in the US before testing started on the Atomic Bomb.
18. Randalls/ Wards Islands
Randalls and Wards are connected by landfill, and loaded with activities from concerts like Governors Ball and Electric Zoo, to an urban farm, to a golf center with batting cages & a beer garden. There's also a rich history involving the Revolutionary War that we've chosen not to explain because, beer garden.
19. Roosevelt Island
Once called Hog Island, Blackwell Island, and Welfare Island, Roosevelt Island is MAX 800ft-wide, and you 1) probably looked at an apartment here once, and 2) didn't get the apartment but still really want to take the tram someday. Also: Grandpa from The Munsters used to live here.