Eh, it's the heavily touristed day use spring in Arima. The better of the two, especially if you like your bath extra hot and enjoy opaque brown water. The spring here is one of those that is 100% identifiable as a hot spring before getting in. You can smell it, see it and feel the heat. Great for a cold, cold day in winter but almost too hot for me during the summer. The massive line of tourists waiting to go in along with the crowds make this place a no-go for me. However, if you are an onsen person you got to try this one at least once. Like Dogo Onsen, it is just too famous. But, just once. Or twice.