Must-see Matsumoto-jō is Japan's oldest wooden castle and one of four castles designated National Treasures – the others are Hikone, Himeji and Inuyama. The striking black-and-white three-turreted donjon (main keep) was completed around 1595, earning the nickname Karasu-jō (Crow Castle). You can climb steep steps all the way to the top, with impressive views and historical displays on each level. Don't miss the recently restored tsukimi yagura (moon-viewing pavilion). The Goodwill Guide Group offers free one-hour tours by reservation.