I'll occasionally wander the city, usually with no destination in mind. I find it comforting on some level, not to have to be anywhere in particular. Seems like everybody is going somewhere, in a hurry, in motion.
If they stop for too long they'll get swept up or run over, or passed by, over looked, lost in the shuffle, maybe just plain forgotten, too wrapped up in their own heads to realize what's happening around them.
Makes me think destinations are terribly over rated...