If you like zoos (and not everyone does), it might be worth the ride out to western Tokyo to enjoy the Tama Zoo. Though the Ueno Zoo is much more famous for its central location and panda exhibit, the Tama Zoo is more spacious and feels much less urban. Tama Zoo is opened on Mondays while Ueno is closed (vice-versa on Wednesdays), so this might be a good option on that day. One highlight of Tama Zoo is the glass paned Lion Bus, made all the more exciting by the staff hanging raw meat on hooks outside the bus windows.