About Liminal, “Thin”, and Sacred Places, Paul Devereux writes:
Such places, natural or monumental, are a way we can key into ancient perceptions and knowledge…many were venerated or located specifically at what were perceived as ‘thin’ and ‘liminal’ places—sites where ‘breaking through’ to otherworld dreams or altered mind states…were felt to be more easily accomplished than other places.
It is also possible to listen to ancient sacred sites: the sound the wind or nearby waters (rapids, waterfalls, springs) make at them the echoes at or around them, and, particularly, the way their acoustics respond to sounds made around or within them…We found that even the source area of the Stonehenge bluestones, around Carn Menyn in the Preseli Hills of South Wales, is a veritable soundscape, thanks to a preponderance of natural ringing rocks and lithophones.
Callanish Stones at Sunset, Lewis, Scotland – photo by stroop, bigstockphoto.com