The locals call it Shanay-timpishka which loosely translates to boiled with the heat of the sun.
The river is about 25 meters wide and 6 meters deep, but only 6.4 km long.
Many unfortunate animals have fallen into the river and got killed.
While there are documented hot springs in the Amazon, nothing is as large as Shanay-timpishka.
Somehow, this natural wonder has managed to elude widespread notice for over seventy five years.
For most Peruvians, the river is only a legend.
Ruzo first heard about the river from his grandfather when he was twelve years old.
In the middle of my PhD, I realized, this river is a natural wonder, Ruzo said.
And its not going to be around unless we do something about it.
Photo credit: Sofia Ruzo
Photo credit: Andres Ruzo
Sources:Gizmodo/National GeographicviaPresurfer