800 Fulton. It could be 300 North Halsted. Or 801 West Wayman. or 303 North Green. But none of those have the panache of 800 Fulton.
And 800 Fulton (that link includes an Oxblue webcam!) keeps sprouting up from this West Loop block, thanks to the efforts Lendlease and crew. Have a look:
Building Up Chicago 