When in Mendoza do not miss this open-air thermal bathing complex, combining a North American–style water park and German spa amidst stunning mountain scenery. An array of pools, as well as a wave pool and slow river, are carved dramatically into the side of a gorge. Mid-week is the best time to come, as weekends are swamped. Cash only.

Lockers, changing rooms, a small grocery store and restaurant are part of the large complex. Rappelling (AR$400), zip-lining (AR$230), rafting (AR$400) and an easy trek (AR$260) are also offered.