wonder of Thiruvidaimarthur

When we went to the Thiruvidaimarthur, we all know that it is a very big temple. After having the darshan of Mahalingeswar , we are doing the pradakshinam, we saw  the awesome sculpture of Ravan lifting the Kailas.Then a local man told that if go to the outer prakaram, there are two holes behind this . when we went there, the man asked us to keep the ear in the hole .We heard the veena music clearly. We are not able to understand the method how the music is produced. Definitely we had great temple builders who produce unique structures.
There are quite a number of special things in Thanjavur temples. Will continue in the next