Tres Fronteras

It includes, and is named for, the tripoint where the borders of Brazil, Peru, and Colombia meet.

Cities in the Tres Fronteras area include Tabatinga (in Brazil), Leticia (in Colombia), and Santa Rosa de Yavari (in Peru) on an island in the Amazon River.

Much of this land is within the borders of the Alto Rio Negro and Yanomami reserves, a combined 18,000,000 hectares (44,000,000 acres).

[1] According to Fabricio Amorim from Fundação Nacional do Índio, the region contains "the greatest concentration of isolated groups in the Amazon and the world".

[4] In June 2022 Guardian reporter Dom Phillips and his companion Bruno Pereira were killed in Tabatinga in the Vale do Javari.