I found this place when I was touring Spain on my bicycle. I have included a website with a picture.
http://www.pueblos-espana.org/comunidad+valenciana/valencia/bolbaite/Zona+de+Ba%F1o/
There is a river that runs by the town. The picture you see is of a pool that is filled by the river. It is carved out of rock. I camped at the base of the pool along with about 4 or 5 other groups of Spaniards. It was great. We all woke up in the morning and went swimming.
It was definitely off the beaten path but worth it if you have seen a lot of Spain.