may i suggest: a presidio walkabout
san francisco: make your way up the sweeping hills of the city to presidio st and pacific st where you'll find an entrance back down into san francisco's presidio. walk down and around, through the trees and about the greens on paved ways and ad hoc paths. there's a ton of secluded bits to explore. when you start running into tourists and too many people, you have my permission to get out of there immediately.
