A pongo is a term used in the Peruvian Spanish dialect for 'canyon'. It is derived from either Quechua puncu or the Aymara ponco, meaning 'door' or 'gate.' See:
The Pongo de Manseriche: a gorge in northwest Peru where the Marañón River runs. The Marañón River has 35 miles of pongo before it joins the Amazon River. The Pongo de Mainique: the most dangerous whitewater pass on the Urubamba River. The Pongo de Aguirre : formed by the Hualaga river when it crosses a part of the Andes.
Notes
References Church, George Earl (1911). "Amazon" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 1 (11th ed.). Cambridge University Press. pp. 786–789.


