With Spring in full bloom we thought it best to publish a map of some of San Francisco's best secret gardens. On our map you'll find historic gardens being preserved on Alcatraz Island, a demonstration garden at a YMCA in the Tenderloin, a mini park rich with flowering foliage on an otherwise nondescript Sunnyside residential street, and more. Oh, and we added a slew of privately-owned public open spaces in the FiDi and SoMa districts. We didn't include private gardens for obvious reasons and community gardens didn't make the cut because we found that the majority are often locked. Below, our favorite secret gardens in San Francisco. Enjoy!