1. Dale Chihuly
At the New York Botanical Garden, through October 29
Colorful glass sculptures set against natural flora and fauna.
2. William Pope. L
“The Black Factory,” at Union Square, July 22
The mobile performance-art installation makes a stop in Manhattan; audience members are invited to bring objects that represent “blackness.”
At P.S. 1, through September 9
Plywood-and-mesh canopies over tidal pools, designed by the firm OBRA, shelter “Warm Up” partygoers on Saturdays.