This is a Jeevasamadhi of Arulmigu Kattangudi Reddy Swamigal.
There is a place to sit and meditate next to the Jeevasamadhi. You can go into meditative states here effortlessly.
How to get there
His Samadhi Koil is in Kattangudi, 7.3 kms north of Aruppukkottai.
Map: https://goo.gl/maps/JqZWgEV8hCKt31ea7
About Kattangudi Reddy Swamigal
Kattangudi Reddy Swamigal was a guru of Mookiah Swamigal.
Read More
https://www.soottukkole.org/history/arulmigu-mookkaiah-swamigal/