aztec culture graphic orange red landscape legend Mexico panorama POPOCATEPETL sky view VOLCANOES bird eagle flag mexican México sculpture snake symbol cactus coin island lake Mexico City nopal sign zocalo aged archaeology architecture attraction landmark old Prehistory pyramid rock ruins stone Teotihuacan tourism touristic tourists Aztec-fruit casimiroa casimiroa-edulis cochitzapotl drupe edible edible flesh edible-pulp food fruit green high-energy-fruuit Mexican-apple ovoid-drupe pit seed skin South-American sweet tasty tropical-fruit vitamin-C-rich white-flesh white-sapote cut inside art baroque cathedral catholic church Ciudad de México Colonial colonial art craftmanship DF Distrito Federal handicraft viceregal art viceroyalty xvi century XVI siecle