Argentina
Parque Nacional Calilegua
Cloud forest draped in moss where jaguars still prowl a jungle rising from the Chaco floor.
Parque Nacional Calilegua in Jujuy Province is Argentina's largest subtropical mountain forest park — a vertical gradient of 800 to 5,000 metres that passes through five distinct ecosystems in less than 40 kilometres, from the hot lowland yungas jungle to the high-altitude cloud forest to the puna grasslands above the cloud line. The park protects the last contiguous tract of Yungas forest in Jujuy Province, and the biodiversity density at the transition zones between the ecosystems is measurable: the same ridge holds birds and mammals specific to each zone within 500 metres of elevation.
Parque Nacional Calilegua covers 76,000 hectares of Jujuy Province and protects the Argentine sector of the Yungas — a subtropical montane forest that runs continuously from Bolivia through northwestern Argentina, and which represents one of the most biodiverse biomes in the western hemisphere for mammals, birds, and reptiles. The park's vertebrate fauna includes jaguars (present in the lower yungas), tapirs, peccaries, bush dogs, giant anteaters, 320 bird species (including the harpy eagle), and the spectacled bear — the only bear species in South America, classified as vulnerable. The road through the park from Valle Grande to Calilegua ascends from 800 to 4,000 metres through cloud forest where the trees are covered in bromeliads, orchids, and ferns, and where the cloud cover is so persistent that many species exist within a vertical range of 200 metres and no more. The park's trail system is minimal — the primary access is the provincial road — and backcountry camping requires a permit.
Solo
Calilegua's biodiversity is best appreciated by the solo traveller who moves slowly through the vertical gradient, stopping at the cloud line where the forest changes character, and spending time at the creek crossings where wildlife concentrates. The jaguar presence in the lower yungas is real — reported sightings are documented — though the probability of an encounter requires multiple days of quiet movement.
Friends
A group with birding interests, camped in the park and working the altitude gradient systematically, finds species specific to each zone. The transition from subtropical jungle to cloud forest to puna — within a single day's hike — is an ecological sequence with no equivalent in southern Argentina.
- The park spans five altitude zones from 400m to 3,200m — each belt holds different vegetation and fauna.
- Jaguars have been confirmed by camera traps at multiple points in recent years — sightings are documented.
- The Morado trail rises from 500m subtropical jungle to cloud forest in 12km — temperature drops 15°C on the ascent.
- Spectacled bears live in the upper cloud forest and are occasionally spotted on early-morning high-trail walks.
Empanadas jujeñas and humitas at Libertador General San Martín, the park's gateway town.
Sugar cane juice squeezed fresh at a roadside trapiche in the Chaco lowlands below.
Pohnpei Highlands
Micronesia
Waterfalls spilling from cloud forest drenched by three hundred inches of rain each year.
Millennium Cave
Vanuatu
Scramble through jungle and wade chest-deep rivers to a cave you enter walking and exit floating.
Munzur Valley
Turkey
Crystalline springs feeding ice-blue pools in a gorge where brown bears still roam undisturbed.
Hinchinbrook Island
Australia
Australia's largest island national park — the Thorsborne Trail through mangroves, reefs, and uninhabited jungle.
Los Gigantes
Argentina
Red granite monoliths rising from the Córdoba sierras like the fingers of a buried colossus.
Volcán Domuyo
Argentina
Patagonia's highest peak at 4,709 metres, surrounded by hot springs and geysers almost nobody visits.
Laguna del Diamante
Argentina
A lagoon at 3,300 metres mirroring a volcanic cone in water too cold to touch.
El Chaltén
Argentina
Granite spires pierce Patagonian cloud as condors spiral through towers of vertical stone.