Termales Del Valle, in San Carlos, Alajuela province, Costa Rica, features thermal water at 40°C, pH 7.3. Indoor and outdoor baths, a sauna, and massage are available.
Insider tip — Termales Del Valle offers natural thermal-water pools in the canton of San Carlos (Alajuela), at the gateway to Costa Rica's Central Volcanic Cordillera. The site is surrounded by secondary forest and African oil-palm fields typical of the region.