"its too much for the modern mind to take in"

significant hills also form the geography of the landscape, they don't have to be sacred in the modern context of religion. Hills could also be named, so that when a neolithic person was travelling, he would make for a certain hill that had particular shape, it would belong in the territory/area of clans or tribes. Slowly everything within the landscape would acquire a shape/name that was familar becoming part of a general mindset....