Our ancestors were acutely aware that certain locations were perceived to have a positive energy field which was beneficial to health and vitality. Over time, these areas are now referred to as sacred sites for spiritual ceremony and as healing centres. In contrast, there are other geographical locations that may have a negative effect upon health and these are known as geopathic stress zones. Judy Hall. “Crystal Prescriptions volume 3: Crystal solutions to electromagnetic pollution and geopathic stress. An A-Z guide”.