Puracé, Colombia

I added this Colombian volcano because I haven't mentioned it much, but unlike the many restless Colombian volcanoes (Galeras, Ruiz, Machín, Sotará), Puracé has been quiet over the past few decades. Now, this doesn't mean that it is not active. Its youthful look, seen in this October 14, 2002 Landsat 7 image, shows that it has had some recent activity, including 12 VEI 2 eruptions between 1900-1977. However, since then the volcano hasn't done much. With a history like it had during the first 3/4 of the 20th century, one can imagine that Puracé won't stay quiet forever.

Image: USGS/NASA