Dedicated flâneurs will appreciate the YBCA's series of unconventional strolls and bus rides through San Francisco's hidden corners. Performance artist Michael Swaine riffs on an Umberto Eco short story by leading a pilgrimage to several of the city's home libraries, while Jonn Herschend invites guests to visit sites of his own emotional crises. Other, less esoteric tours include a visit to the Presidio's Lovers' Lane, a look at land use on Treasure Island, and an "unnatural history" walk through Golden Gate Park.