A geothermal field of springs and eruptions of boiling water, mud and steam, the Tatio Geysers are located roughly 100 kilometres from San Pedro. They are at their most impressive just before dawn, when the contrast between the heat of the springs and the cold air is at its greatest, spurring on the thermal activity. It’s possible to bathe in some of the surrounding pools, which have a temperature of around 40 degrees Celcius.