The cache is located in Randall's Island Park (map, originally from here) but not at the posted coordinates. Solve the puzzle below, before going out into the field, to determine the correct location.
34-38-36-25
19-15-36-25-19
25-36-38-32
23-36-13
14-36-23
15-36-34-38-34-25-18
36-15-17-23-37-19
12-33-23
14-36-34-38-34-23-17
36-14-38-34-25-18
14-38-34-36-34-25
36-15-13-34-25-19-13-34-36
38-34-23
32-38-33-22