Calaveras Mesa had not always been uninhabited. In the fourteenth century, Anasazi Indians had moved into its south-facing cliffs and hollowed out caves in the soft volcanic tuff. But the site had proved uncongenial, and the caves had been abandoned for half a millennium. In this distant part of El Malpaís, there were no roads and no trails; the caves remained undisturbed and unexcavated.
