My first reason to go to the Met this weekend was to see the Schiaparelli and Prada exhibit. It was good but it's difficult to come after the Alexander McQueen exhibit. Comparisons cannot be helped.
But then I made it to the roof to view this -
Cloud City by Tomas Saraceno. You can even get tickets to walk through the structure but they were sold out the day I visited.
Another reason to go on the roof -