The famed Monkey Ruins in Prax, a holy site for Baboons (who are a sentient species in Glorantha). Excerpt from the Guide to Glorantha:
These are the ruins of the City of the Monkey. When Oakfed fell to earth, he landed on the city, destroying most of the inhabitants. The ruins are the centre of the Praxian cult of Oakfed. Here any shaman can attempt to contact that great spirit with the proper sacrifices. No Oasis Folk live here, and the ruins are sacred to the intelligent baboons of Prax.