For his book, Up on the Roof: New York’s Hidden Skyline Spaces (Princeton Architectural Press), photographer Alex MacLean went up so that he could look down
An early look at the new 10,000 square-foot-living roof on top of the new Brooklyn Botanic Garden visitor center, due to open on May 16, 2012. Plus: Photos of magnolias—in yellow and pinks—in bloom at the garden!