Mamleshwar Temple, Omkareshwar. This temple is located on the south side of River Narmada, and is also called the Amreshwar or Amleshwar temple. Amareshwar (whose name means “Immortal lord” or “lord of the Immortals or Devas”).
The other temple Omkareshwar is across the river on an island called Mandhata or Shivapuri. As per Dwadash Jyotirligam, Mamleshwar is the jyotirling.