I like the East Bay Bridge. It's a double-decker bridge! Since I don't drive out here in CA, I rarely go on it, only when I luck out and get offered a ride home from work. Rides home not only save me money, they sometimes save time (although if traffic's bad, taking the train under the bay can actually be faster), but they give me a chance to have good conversations with acquaintances I may not get to talk to like that very often.