THE MYTH OF THE INCA ORIGIN.

The Incas tied their mythic origins to a place called the "Inn" or "the House of the Dawn" located near Pacari-Tambo and their authority to their mythological associations to "the Island of the Sun" in Lake Titicaca.
Pacari-Tambo refers to a village of the same name located 26 kilometers South of Cuzco.
The Inca are said to have emerged from one of the 3 caves or windows from a nearby mountain named "Tampu-Toco"(House of Openings or Windows).
The original Inca consisted of 4 pairs of siblings or spouses. The first ancestral spouses to emerge from the "central window" called "rich window" were Ayar Cachi and Mama Huaco.
The name Ayar Cachi means "ancestor salt." Salt (cachi), the spice of sea-water and at the same time the bottom of Lake Titicaca (the top is fresh water), harbors symbolic connotations to water fluidity and the circulation of underground water or subterranean water, as is widely conceptualized among the people of the Andes.
Through the underground passages the mythological ancestors descended into from the Island of the Sun in Lake Titicaca to Pacari-Tambo, both were part of a subterranean water system. On reaching the valley, they went to the top of a sacred hill called Huana-Cauri. There Ayar Cachi took out his sling and hurled sling stones in 4 directions, and they struck so hard they knocked down the surrounding hills, creating ravines.
The sling stones were not perceived as weapons, but as a symbolic way to represent the mythological creation of the Valley of Cuzco.
The Inca linked their mythology to the world of the heavens, in that realm the Inca perceived Viracocha the Creator god as a man made up of stars with a sling in his right hand and dressed in shining garments who gave off lightnings when He whirled his sling or wanted rain.
Lightning associations to later veneration of Viracocha the Creator god, appear to have been absorbed from the earlier religious beliefs and rituals related to the Gate Way or Staff God, of Tiahuanaco and Wari civilizations. To the Incas, lightening was the major divine force in the heaven realm, it was believed to control thunder and, by extension, all climatic forces, particularly rain, hail, and rainbows.
The so-called "Warrior relief" below and surrounding the image of the weather and sky related deity Thunupa, has been found to record various celestial cycles. It appears to be that the natural world exists in multiple temporal cycles, some tied to an annual subsistence round and others to the periodicity of cosmological cycles. Thus multiple modes of a historical and mythological past are real and in that they coexist and continually contribute to the ongoing process of life.