This is a Jeevasamadhi of Sri Mounaswamy.
There is a place to sit and meditate next to the Jeevasamadhi. You can go into meditative states here effortlessly.
How to get there
This Jeevasamadhi is located 1 kms North East of Arulmigu Subramaniya Swami Temple at Thiruparankundram.
Map: https://goo.gl/maps/GLWLLY1T7Qkg23tj6
The Jeevasamadhi temple contains the images of Soottukkole Yogis as well as Siddhars.
No information is available about Sri Mounaswamy to us.