Unai village, situated in Vasanda Taluka of Navsari District, is popular for various hot water reservoirs. It is believed that Lord Rama called many Brahmins for a yagna here. For fulfilling the need of hot water of the Brahmins, he shot an arrow in the land that resulted in producing a flow of hot water of River Ganges. The Unai Mataji Temple in the village has an idol of Ushar Ambaji installed by Lord Rama's consort, Sita.