Thannot Mahavishnu temple is located on Ravaneshwaram - Thannott Road is located at Thannott in Kasaragod district, Kerala. The shrine is dedicated to Bhagavan Srihari Vishnu. The temple has a chathura sreekovil (square sanctum sanctorum), small pond, nalambalam and namaskara mandapam.
The upa devatas worshipped in the temple are Ganapathy, Devi and Sastha.
The shrine observes various festivals including Vishu and
Thiruonam. Ekadashi in every fortnight is of great importance in the temple.