This is Willis Tower, better known to most as Sears Tower. Not the greatest of shots, but it was a hectic day. You cannot see the full height of the building but you can see the new glass viewing boxes that jut out of the top of the building on the viewing deck.
@whatsfordessert@altadc Thank you. Once the summer tourists have thinned out in a view months I am going up so I can take some shots from the glass viewing boxes at top and get the opposite pov.