Thirukadaiyur Kalasamharamoorthy Temple is one of the important Shiva temples north of Nagapattinam. It is tied to the story of Shiva saving the young Markandeya from Yama, the god of death, which is why many devotees come here for rituals connected with long life.
The temple is especially associated with 60th and 80th birthday ceremonies for married couples. Even if you are not there for a ritual, the temple is a useful stop on the pilgrimage route between Nagapattinam, Poompuhar, and the old coastal towns of the Cauvery Delta.