A sprawling, four-star hot-springs resort, this is a terrific destination for families. There are 30 natural pools on the property that differ in size and atmosphere, including soaking pools, an expansive swimming pool and a 400ft water slide. Many guests stay the night, but it is also possible to purchase a day pass.

Room rates (from $142) include hot-spring access. Private cabins (from $185) are fully equipped and there's a full-service spa on site, offering body wraps, exfoliations and five types of massage.