Fodor's Expert Review Parque Provincial Aconcagua

Extending 66,733 hectares (164,900 acres) over wild, high country, this provincial park has few trails other than those used by expeditions ascending the impressive Cerro Aconcagua (Aconcagua Mountain). You can get multiday permits for climbing it—either through your tour operator or on your own at the Mendoza Tourist Board Visitor's Center in Parque San Martín—but do check exactly what permit you require whether you are undertaking a short trek or an expedition over several days, with or without a tour operator; it's open weekdays 8–6 and weekends 9–1. Day permits (to visit as a tourist, not trekker) are only available online.