Juanjuí is a town in Northern Peru, capital of the province Mariscal Cáceres in the San Martín Region and located in the left edge of Huallaga River. There are 54,006 inhabitants, according to the 2010 census.

Gran Pajatén is an archaeological site located in the Andean cloud forests of Peru, on the border of the La Libertad region and the San Martín region, between the Marañon and Huallaga rivers. The archaeological site lies in the Rio Abiseo National Park, which was established in 1983. The park was designated a UNESCO World Heritage Natural Site in 1990, and Cultural Site in 1992. In order to protect the fragile ruins and endangered environment, the archaeological site and the national park are currently not open to visitors without permits from Peru's Ministry of Agriculture and National Institute of Culture.