This Hindu temple is devoted to Karni Mata, a goddess who is said to have reincarnated her devotees into rats upon death. Today the temple is home to hundreds of rats which represent the reincarnated. Hindus come to worship at the temple and bring offerings of sweets to the rats. The rats are sacred, and it is said that if you kill a rat (by accidentally stepping on it), you must replace the rat with its weight in silver.
http://www.wolfstad.com/2006/04/the-...-of-rajasthan/