World Record for Tallest LEGO Tower: 112 feet, 11.75 inches. 500,000 LEGO bricks assembled by a Delaware school district.
Adam Rifkin stashed this in LEGOS!!!
Here it is in the Imgur gallery: http://imgur.com/gallery/iYRSh
More of the story is in io9: http://io9.com/the-worlds-tallest-lego-tower-ever-1171214996
Stashed in: Mother of God!
This is the first time the world record isn't held by the Lego company or a country.
Here is a video about this particular effort:
How many LEGO bricks, stacked on each other, would it take to crush the bottom brick?