This is one of the Jyotirlingas. You can make offerings and go in close proximity of the linga. You cannot sit next to the linga however there is a place to sit and meditate. You can go into meditative states here effortlessly.
How to Get There:
You can reach Omkareshwar from Indore via bus. The first bus starts at 6 AM.
Map: https://goo.gl/maps/FuRb5rNd6hifqzm88
About Sri Mamleshwar Jyotirlinga
The ancient name of Mamaleshwar Jyotirlinga is Amareshwar. Both Omkareshwar and Mamaleshwar are the form of the same Jyotirlinga. Mamaleshwar jyotirlinga is on the south bank of the Narmada, and Omkareshwar Jyotirlinga sits on the Omkar Parvat towards the north bank of the Narmada. Maa Narmada is in the middle of both temples. According to the verse of Shiva Puranokta Dwadash Jyotirlinga Stroth, the names of all the 12 Jyotirlingas are known as their place area.
सौराष्ट्रे सोमनाथंच श्री शैले मल्लिकार्जुनम् |
उज्जयिन्यां महाकालमोंकारममलेश्वरम् ||
In this verse, Mamleshwar has been described as Jyotirlinga in the Omkareshwar region.
Ma Narmada is the daughter of shiva. The father has a special affection for his daughter, which is why Sakshat Omkareshwar and Mamaleshwar are seated on both sides of Maa Narmada. If Omkareshwar is the soul of Shiva, then Mamaleshwar is the body of Shiva, in short together they fulfill the recognition of a Jyotirlinga.