Are you looking for something to do on a wet and drizzly day? Explore the interesting displays at Saitama Museum of Rivers. There's always an opportunity to learn a thing or two.
When you've finished at this museum in Yorii, why not make your way to Aqua Paradise Patio, Nagatoro Iwadatami, and Saitama Museum of Natural History? They're close to Saitama Museum of Rivers and also a hit with many tourists.