there are 693 steps in the

murugan temple

Thiruchendur's population is 29,330.

I was searching the same for three months and finally found it. Its pachaimalai murugan temple (gobichettipalayam)

http://www.pachaimalaimurugan.tinfo.in/

Lord Murugan is famous god in tamilnadu there are six historical temple for Lord Muruga that's called Arupadai Veedu (six abodes) . Arupadai Veedu temples are the most significant shrines for the devotees of Lord Muruga in Tamil Nadu. The Aarupadai Veedu (six abodes) are Palani , Tirupparamkunram, Thiruthani , Swamimalai, Thiruchendur , Pazhamudircholai has been separate thalapuranam

thiruchendur