Andoor Mahavishnu temple is located at Andur near Valakom in Kollam district, Kerala. The shrine is dedicated to Vishnu Bhagavan. The annual festival in the temple is held in Meena Masam (March – April).
This is a beautiful Kerala style temple and the deity faces west. The temple has a chathura sreekovil, nalambalam, namaskara mandapam and various shrines of upa devatas. There is a huge peepal tree in front of the shrine. The shrine also has a huge pond.
The annual festival in the temple is famous for various Vaishnava rituals and pujas. Ezhunnallathu, melam, and traditional performing art forms of Kerala are part of the annual festival.
The shrine observes Vishu and Thiruvonam.