Sprinkled all throughout San Francisco are over 220 public parks and open spaces, but the spotlight is always on Golden Gate Park or Dolores Park. But what about the rose gardens at Fay Park in Russian Hill? Or the view atop Kite Hill in Eureka Valley? Did you even know that John McLaren Park is the second-largest park in the city? Or that the idea of Twitter was allegedly hatched at South Park? And really, you haven't lived until you've swung from the tree rope at Glen Park's Billy Goat Park. Because of this, we've decided to map what we believe are 66 of San Francisco's best parks, most of which you probably didn't know existed. Did we miss your favorite park? Let the tipline know or drop a comment after the jump.