Rock Fort is a dramatic rocky outcrop rising 83 metres above the Trichy plain, about 3 kilometres south of Srirangam island. Two temples sit on the rock: the Thayumanaswami Temple (Shiva) partway up, and the Ucchi Pillayar Temple (Ganesha) at the very summit, reached via 437 rock-cut steps. The climb is steep but manageable, and the views from the top take in Srirangam island, the Cauvery and Kollidam rivers, and the flat Tamil plain extending in every direction.
The temples are active worship sites, not just monuments. Shoes must be removed before entering. The summit Ganesha temple is a major local pilgrimage site and crowded on festival days. Non-Hindus are permitted in both temples. The base of the rock has an archaeological museum with finds from the region. The complex is best visited in the early morning or late afternoon to avoid midday heat on the exposed rock face.