Finally found it!! More than #200years ago #JohnRandelJr, in the years 1810 and 1811, marked with iron bolts and marble slabs a big chunk of #Manhattan Island. He helped map out the #grid we know now of avenues and streets North of the densely populated lower tip of the #islandofmanhattan. The above pictured #survey #bolt is a #hiddengem into marking that process 5 decades before #NewYork's #CentralPark was even designed! #nyc #landmark #history #johnrandel #parkmystery #outintheopen #surveybolt (at Central Park)













