This has become one of my favorite pictures.
Who would have guessed that the amusement park closest to my apartment in Japan would also be the oldest? Hanayashiki is an old-style park with modern rides - everything is shoehorned into a tiny space in a corner of Tokyo.
Hanayashiki opened in 1853 as a flower park, and as you've seen a small reminder of the gardens remains. Admission is 900 yen, and a free pass is an additional 2200 yen. The park is nearly open year-round with a closure for about a week in early December for maintenance. Several train lines reach Asakusa or the nearby area, and depending on the line you start in a different place. Note that JR trains don't go to Asakusa, though you can get there by Tokyo Metro or walking a bit further. Amusement park aficionados should plan to visit the park on a trip to Japan due to its history, and others looking for a few hours of fun with elementary school-level children will find it here.