Reginaldo Rohden is an ex-student of my family's English school.He is a big traveller and here are some pix of his latest adventureto Patagonia.
Check it out and try the same,if you dare. Currently he lives in Curitiba.
Tourists bathing at the famous Geysers del Tatio, located in the Andes Mountains of northern Chile
at 4200 meters above mean sea level. 
