The official name of the gigantic white mesh structure filling the Cooper Union's New Academic Building. Often used as a climbing wall by students to relieve some stress or simply to get from the 6th floor to the 7th floor in the absence of a stair case. In fact, the megagrid serves no conceivable purpose other than that of climbing.
Hey, did you hear somebody climbed up the megagrid the other day?
Let's all thank the architect for designing such a practical building!