Here is a list of sites visited, with accompanying observations and video footage. Other sites have been visited but I only have photos and for whatever reason did not have a chance to experiment. I try to respect other people's beliefs and if they want peace and quiet to meditate then its fine by me.
For the best results so far, see:
Lligwy Burial Chamber, Anglesey, Wales
For the best video of techniques used, see:
Other sites visited and filmed include: