Río Abiseo National Park

Cloud forest hides both wildlife and ruins in Río Abiseo. Created in 1983 on the Amazon-facing slopes of the Peruvian Andes, the park shelters strongly endemic flora and fauna — including the yellow-tailed woolly monkey, once written off as extinct — while surveys since 1985 have revealed 36 pre-Inca archaeological sites between 2,500 and 4,000 m, Gran Pajatén among them. UNESCO inscribed the park as a Mixed site in 1990; access is tightly restricted.