Ranganathaswamy Temple, Srirangam

The Ranganathaswamy Temple at Srirangam is the largest functioning Hindu temple complex in the world, covering 156 acres with 21 gopurams, 50 sub-shrines, and several mandapas. Situated on an island in the Kaveri River, it is the most important Vaishnava shrine in India.

The earliest structures date to the Chola period (around the 10th century CE), with major expansions under the Vijayanagara kings. The outermost seven enclosures (prakarams) constitute a self-contained city. The Rajagopuram rises 73 metres, one of the tallest temple towers in Asia.

The main deity, Ranganatha (a reclining Vishnu on Adi Shesha), is revered as the presiding deity of all 108 Divya Desam Vaishnava shrines. Vaikunta Ekadashi draws over a million pilgrims annually.