One Wilshire

This contains the world's densest "meet-me" room. Over 260 ISPs connect their networks here. 

"One tends to think of the internet as a redundant system of remote carriers peppered throughout the world, but in order for the net to function the carriers have to physically connect somewhere. For the Pacific Rim, the main connection point is the One Wilshire building in downtown Los Angeles. If this facility went down, most of California and parts of the rest of the world would not be able to connect to the internet."