The raging waters of the Río Pastaza tumble down the mountains at Pailón del Diablo (Devil's Cauldron) waterfalls on the descent from Baños in the mountains to Puyo in the rainforest. In the rocks below, you can make out images of the devil's face. These falls tumble into a raging cauldron before continuing down among huge boulders. Note the two figures near the lower right for an idea of scale.