The Agastheswara Temple in Mysore district of Karnataka is the shrine of Lord Shiva. It is situated on the banks of the Cauvery river at Tirumakudalu Narasipura (also called T Narasipura).
This is a sacred sangama (convergence) of rivers Kaveri, Kabini and Gupta Gamini ( this is supposed to be a mythical lake or spring). The highlight of this temple is the water trickling down from the head of Lord Shiva.
As per legend, Sage Agastya had trapped the Cauvery river in a Kamandalu when she rejected his marriage proposal. Then Lord Ganesha took the form of a crow and tumbled the kamandalu thus freeing the river and allowing her to flow freely. Then Agastya realised his mistake when he realised that it was indeed Lord Ganesha in the form of a crow. Then he established the Agasteeshwara temple along the banks of the river.
The Chariot Festival in Agasteeshwara Temple attracts thousands of devotees to the temple . The Kumbha mela of T Narasipura is an event that takes place every three years. The Kumbha mela of Allahabad and Nasik is replicated at T Narasipura when lakhs of devotees assemble and take a holy dip in the confluence of the three rivers. There is an old peepal tree which is said to be about 2000 years and is known as Brahmaswatha.