Bhagamandala is situated on the river Kaveri in its upstream stretches. At this place, the Kaveri is joined by two tributaries, the Kannike and the mythical Sujyoti river. It is considered sacred as a river confluence (kudala or triveni sangama, in Kannada and Sanskrit respectively).
During Tula Sankramana which falls on October 17th or 18th every year, pilgrims assemble here in large numbers. Sri Bhagandeshwara temple is a Famous temple near triveni sangama, where Bhagandeshwara (Ishwara), Subramanya, Mahavishnu and Ganapati temples are there. The Bhagandeswara temple complex though said to have been built by the Cholas prior to th 11th century follows the gabled roof style of the Kerala temple architecture common on the west coast.