Beautifully disorientating was the sculpture by Tomas Saraceno, located in the roof garden of the Met museum. You booked timed tickets and you could then walk up and around it. There were perspex floors that flexed under foot and mirrors and gaps everywhere. You were not allowed to take photos as people had got distracted.
Sounds wonderful. What a fabulous experience – love seeing the clouds and blue sky. Must be difficult to find amongst all those skyscrapers.