Legend has it that the lingam there is one of the 108 that Agastyar created. He is said to have adorned the deity with konrai garland and worshipped with tulsi leaves. It is said that worshipping Siva on Mondays with tulsi earns the devotee the Lord’s affection.
Work is partially completed but is the renovation has appealed for funds. For details see contact information at the source above.