Perhaps the most famous festival of Kerala, Onam, is deeply rooted in Kerala traditions. Onam is associated with the legendary king Mahabali (Maveli), who according to tradition and Puranas, ruled the Earth and several other planetary systems from Kerala. His entire kingdom was then a land of immense prosperity and happiness. However, Mahabali was tricked into giving up his rule, and was thus overthrown by Vamana (Thrikkakkarayappan), the fifth Avatar (earthly incarnation) of Lord Vishnu. He was banished from the Earth to rule over one of the netherworld (Patala) planets called Sutala by Vamana. Mahabali comes back to visit Kerala every year on the occasion of Onam.