We think that since we have advanced technology like micro processors, cell phones, and cars that we are more advanced than humans that lived in ancient times. However, the ancient peoples had a knowledge of vibrations that far surpasses what we understand today.
In many places around the globe, we find natural caves, underground caverns that have been acoustically altered, and man-made underground structures that were designed and used to transform the consciousness.
Step into the world of the ancient shamans with this documentary video:
Unlocking the Hidden Knowledge of the Ancient World