Well, the altitude is impressive – 6,390m above sea level. But the lake itself is another small crater lake, with a diameter of only 100m and a depth of 10m. It doesn’t even have its own name, just taking the name of the volcano it sits upon – Ojos del Salado, or “The Eyes of Salty Water” in English. It’s the highest volcano on Earth and is not entirely dormant, having had some recent volcanic activity such as sulfuric gases and vapors leaking out.