If there is one thing that Fukuoka City doesn't have, it's a beautiful historic castle. It did long ago, built in 1601 by Nagamasa Kuroda, but now all you can see are its remains. Even so, you can walk by the castle moat, and into what used to be inside the castle (Jo-nai) to get a pretty good idea of what existed, and its strategy of keeping invading armies out (it was never needed for that though, as history turned out). You'll also find VERY few people who go inside, surprisingly, and is a nice place for a picnic or afternoon snooze. It's next to Ohori Park, and closest to either the Ohori-Koen or Akasaka subway station.
