Book excerpt: When Cortes and his battle-weary Spanish soldiers first gazed on the Aztec capital Tenochtitlan in 1519, they viewed the amazing culmination of 3,000 years of continuous cultural development. Aztec and Maya cities, temples, and palaces were in some ways like those found in Mesopotamia and Egypt: civilizations that had developed in isolation, free of outside influences. Here are the legends and stories of these two unique, ancient cultures.