Awesome and remote, this national park brings visitors face to face with the 30,000-year-old San Valentín glacier in Chile's Campo de Hielo Norte. Established in 1959, the 12,000-sq-km Unesco Biosphere Reserve is a major regional attraction. The park encompasses peaty wetlands, pristine temperate rainforest of southern beech and epiphytes, and 4058m Monte San Valentín, the southern Andes' highest peak. Scientific interest centers on the extreme fluctuation in water level of the glacier-fed lagoon.
Until recently, getting here was expensive and time consuming, but a road built through Valle Exploradores has created options to go overland with a little help from tour operators in Puerto Río Tranquilo. Visitors who arrive by cruise shift to smaller craft to approach the glacier's 60m face. Stay overnight to hear the sighs, splintering and booms of calving ice.