I'm not sure about it but I'm guessing your talking about the Resort.
Finish the Plant Mama quest first.
In the deep forest past the Gaping Plant, after the Pacification of plant mama you can visit a newly refurbished temple now resort where Bell, can visit.
The spring is over there.
This also means you have got to have the additions of the Milk farm plus the refinery so that you could make *Cheese* it's the ticket past the Gaping Plant, by ticket I meant giving it to the fairy Queen after playing with her.
Guys I meant their Spring Spa.