Omkareshwar is a Hindu temple in Madhya Pradesh state in India. It is on an island called Mandhata or Shivapuri in the Narmada river. It is one of the 12 revered Jyotirlinga shrines of Shiva. It is about 12 miles from Mortakka in Madhya Pradesh. The shape of the island is said to be like the Hindu Om symbol. There are two temples here, one to Omkareshwar (whose name means "OM-maker-lord") and one to Amareshwar (whose name means "immortal lord" or "lord of the immortals").