Or, if you want something different, you can try their sulfur pool which costs more but not that very big of a price gap between them.
I think more prefer the hot spring judging by the number of people who were there when we tried it compared to the sulfur pool where the number of people there was a few.
Photography wise, the hot spring pool offers a more scenic view, just like a small private garden at the back of your house.
To get the best place to experience the really hot sensation of the hot spring, go near the center that looks like the one in the photo below.
The hot spring area is not really a big place, so you can't miss that.
Choosing between the cold pool and the hot spring, I would say the hot spring wins hands down!