September 1st, 2011
Game: The Darkest Puzzle
Type: Dead Drop
Location: Grand Ferry Park in Brooklyn, NY
Date: dropped August 31, 2011
The Darkest Puzzle is a 9/11 conspiracy ARG that has just recently started. It’s newest “puzzle” is a video of a man who appears to be hiding something in some rocks on a waterfront. Players have determined that it is the Grand Ferry Park in Brooklyn, NY. No idea what is there or even why that location was chosen (hopefully the item is waterproof) but presumably it’s important enough to warrant a video of it’s drop on the game’s Facebook page.
Thanks to @wikibruce for the heads up.