The Sree Mahavishnu Temple in Mullackal, Alappuzha, Kerala, is a significant and charming Hindu temple dedicated to Lord Vishnu. Located in the heart of Alappuzha, this temple is celebrated for its tranquil atmosphere and stunning architecture, reflecting the traditional Kerala style.

The temple is known for its various deities, including Lord Vishnu, who is represented with four arms holding a conch, wheel, club, and lotus, embodying his divine attributes. There are also sub-deities such as Lord Ganapathy, Goddess Bhuvaneshwari, and Nagaraja. The temple's serene environment and spiritual ambiance make it a place of peace and devotion for many.

One of the notable festivals celebrated here is Navaratri, a festival dedicated to the nine forms of the Goddess Durga. Another significant event is the Thaipooyakavadi festival, which occurs in December. The temple also holds importance during the annual Mullakkal Chirappu festival in November.