1) Complex volcano 
Payachata or Paya Chata (Aymara pä, paya two, Pukina chata mountain, `two mountains`) is a north-south trending complex of potentially active volcanos on the border of Bolivia and Chile, directly north of Chungará Lake. The complex contains two peaks, Pomerape to the north and Parinacota to the south. On the Bolivian side the volcanoes are loc.....