There’s basically one reason to visit Chidambaram: the great temple complex of Nataraja, Shiva as the Dancer of the Universe. One of the holiest of all Shiva sites, this also happens to be a Dravidian architectural highlight.
Of the town's many festivals, the two largest are the 10-day chariot festivals in June/July and December/January. In February/March the five-day Natyanjali Dance Festival attracts classical dancers from all over India to the Nataraja Temple.
Most accommodation is close to the temple or the bus stand (500m southeast of the temple). The train station is about 1km further southeast.