As a traveler and a sort of amateur anthropologist I am interested in the origins of religions and rituals. 
At the Qing Yang temple in Chengdu, Western China
Read this article on the discovery of earliest known ritual in the world.
Associate Professor Sheila Coulson, from the University of Oslo, can now show that modern humans, Homo sapiens, have performed advanced rituals in Africa for 70,000 years. She has, in other words, discovered mankind’s oldest known ritual.