Sri Guru Raghavendra Swamy Temple of Mantralayam is one of the chief tourist attractions of the region. The guru is believed to be an incarnation of Bhakta Prahlada, who was an ardent devotee of Lord Vishnu. Lord Vishnu saved his devotee from the cruel intentions of his father by taking the form of Lord Narasimha and killing the monster father of Prahlada. Sri Guru Raghavendra Swamy chose Mantralayam for forming his Vrindavana.
The temple is very popular amongst the thousands of devotees of the guru who make it a point to visit the temple every year during the time of Guru Jayanti. On the day of the Jayanti, the temple is bustling with activity since it is a day of celebration and thousands of devotees come to participate in the festivities that continue for two days. It is believed by many devotees that the guru still resides at Vrindavana and according to the guru himself, he will continue living at the place for the next 361 years.