Declared World Heritage Site by UNESCO in 1991

Location: Department of San Martín, county of Mariscal Cáceres.
Area: 274,520 hectares.

Protected and intangible area of exceptional beauty, historical values and biological wealth; protection of the fauna and flora of the foggy forests. Archaeological location Citadel of the Great Pajatén. Furrowed by the river Abiseo and their tributaries.

The Great Pajatén
Is an archaeological pre-Inca Center, recently discovered in 1963 by Carlos Torrealba. The citadel is located on a plateau surrounded by a hill steep at 2,850 m above sea level, circular constructions prepared in different levels, paved platforms, monoliths, beautiful stony canvases built in slate flagstone, perrons made in flagstone, decorations of geometric drawings on high relief. The whole archaeological group is of great singularity and artistic sense that it is not concordant with other expressions of well-known cultures in Perú.