"Cheryl Haines has had a long and successful career as a gallerist, but she's best known in her home city as a fierce advocate for public art—she's the visionary that brought Andy Goldsworthy's signature Spire in the Presidio. Most recently, she's gained critical acclaim for bringing a major site-specific work by Ai Wei Wei to Alcatraz (and dying her hair blue in the process). With artists like James Turrell on her roster, a visit to her tiny Union Square gallery, which is a total hidden gem compared with the large public artworks she's better known for, is never a disappointment."