One moment I'm in Twitter HQ, enjoying free food from around the world, place is buzzing with techies. Next moment we wander around a bit and there's a whole park where the homeless are living in the bushes.
I was literally in a place where one guy I met was designing self driving cars, and another guy was wandering the street with no shoes on, fighting with his invisible friend.
I also thought the natural surroundings were a contrast with what people have built. Minus the bridge and a few landmarks, the city looks kinda bland. Too low-rise for such a popular place. But there's hills and natural features that are quite spectacular.