 We step onto the 'elevator' (a modified window-washing rig), and look down into the hole as we begin a slow descent. The guide explains more about the geology of the volcano as we look at the layers in the walls. Apparently, this is the only dormant volcano in the world where you can go inside. Most of the time, the magma cools and hardens in place -- but for some reason, it drained out of this one while still liquid (about 4000 years ago), creating a cavern.
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