Omkareshwar (whose name means “Lord of Omkaara or the Lord of the Om Sound”) located in the island and one to Amareshwar (whose name means “Immortal lord” or “lord of the Immortals or Devas”) located on the south bank of Narmada River on the mainland. As per the sloka on dwadash jyotirligam, Mamleshwar the other name of Amareshwar is the jyotirling, nonetheless, many consider both Omkareshwar and Mamleshwar equally sacred and representative of jyotirling at this sacred place.
Omkareshwar : https://en.wikipedia.org/wiki/Omkareshwar
Hanumantiya Gallery : http://www.suneelkushwaha.com/photo-gallery/?album=6313024985123224721
Hanumantiya Tapu : http://hanumantiyatapu.com/Hanumantiya-Tapu-Island-Tourism-Resort.aspx