Pilgrims going to Kukke Subrahmanya Temple in Subrahmanya have to cross the Kumaradhara River. They take a holy bath in the river and then go on to the temple to have darshan. There is also another river called the Darpana theertha which flows just behind the temple.
The belief is that Vasuki and other snakes took refuge under God Subrahmanya in the caves at Subramanya. Here God Subrahmanya is worshipped as a snake. This is the god's divine power.