A photo of Toshimaen amusement park としまえん, the water park section (map). Wikipedia notes: “Toshimaen was the first in the world to have a river pool in 1965.”
A photo of Toshimaen amusement park としまえん, the water park section (map). Wikipedia notes: “Toshimaen was the first in the world to have a river pool in 1965.”