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Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States
 
 
 
Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States Out on a Limb, Tree Canopy Walk by Metcalfe Architecture & Design in Morris Arboretum of the University of Pennsylvania, United States