Just few weeks back went to Tiruvannamalai and took this picture – Idukku Pillaiyar Temple… You can see this temple in right hand side when you go for Girivalam, as the name denotes, you can hardly see very small space between 2 stones, people enter back of the temple and come through the small space…
Its believed that by entering through the 2 small stones – Idukku pillaiyar heals the body from ailments… also seen in the wall painting as – No offerings accepted and wondered.