Snippets of information from the Andes in The Observer as to the discovery of  “ancestor stones” of the Inca, a rare find, echoing a familar story of stones connecting the celestial world with the underworld that we find in our own prehistory, you can read the full story here

A British team of archaeologists on expedition in the Peruvian Andes has hailed as “sensational” the discovery of some of the most sacred objects in the Inca civilisation – three “ancestor stones”, which were once believed to form a precious link between the heavens and the underworld…………

The conical-shaped stones were among the most significant items in Inca society and religion. Key elements in ritual events, they were thought to facilitate a connection between different realms of the world – the celestial and the underworld of the ancestors – with the Inca king, as the divine ruler, acting as intermediary. And they were considered more precious than gold……..

Ancestor stones represented deities, ancestors and the sun, and were imbued with supreme symbolic significance. They were greeted with incomprehension by Spanish chroniclers of the early 16th century, who sacrilegiously likened their shape to sugar loaves, pineapples and bowling pins. The insult, however, was returned: when the 16th-century Inca ruler Atahualpa was shown a copy of the Bible by the Conquistadors, he reacted with similar contempt………

More information here From the British Museum website on Usnu sites, and the relationship of these sites to the surrounding sacred area of mountains, seen as gods.