Cache is not at the posted coordinates. You will need to complete the Adventure Lab cache, The Modern Art Tour in Chicago Premium Outlets to obtain the final coordinates.
Chicago Premium Outlets offer good shopping experience with 160+ stores, but your mission here is to visit 5 modern arts to complete adventure lab cache, The Modern Art Tour in Chicago Premium Outlets and collect clues to find this bonus cache.
Every art installations and clues are outside, no need to go to any store at all.
These arts can be visited in any order: Blades, Dancing Couple, Standing Figure #2, A Sculpture Made by Heidi Hoy and Joy.
Hope you will enjoy a nice walk admiring the modern arts!