Clever // Nadja Sayej // 04.26.19: From a rainbow made of mirror to a New York rooftop with a marble galaxy, this summer is bringing some stunning public art to cities across the country. Because public art is a standard selfie background on Instagram these days, we expect people to flock to these outdoor works—ranging from materials made of steel, plastic and, yes, mirror—when they’re unveiled. But don’t be fooled, these aren’t just photo ops. We noticed a recurring theme of environmental crisis and climate change, as well as our relationship to the cosmos, fitting since the 50th anniversary of the Apollo 11 moon landing is July 20. Hot on the heels of the public art initiative Frieze Sculpture at Rockefeller Center opening this week, we’ve rounded up the best free public art installations to come this summer. Mark your calendar and set your Google Flights price alerts—you’re not going to want to miss these.