Even though this happened 15 years ago, I remember everything very clearly. The coldness of the water flowing down from the Andes, and heat extend of the hottest pool (127 degrees), the farmer's field across the river and the cows grazing about. A very amazing journey and (at that time) 7K of dirt roads strew with boulders and dry wash rivers, weaving in and out of tall now-extinct volcanic mountains. Breathtaking!