Agastya Rishi, one of the important Vedic sages among the seven sages (Saptarishis) and the first disciple of Lord Kartikeya, is believed to have established a Shivling on the banks of the Namada River according to mythological accounts. This site is now known as Parikrama Vasi Agasteyshwar Mahadev Temple. The temple is located not far from Garudeshwar Mahadev Temple, which is part of the Narmada Parikrama pilgrimage route. Here, there is also a self-manifested Kedareswar Shivling. Adjacent to the temple is an ashram for devotees performing the Narmada Parikrama, with special significance during Kartiki Chaturdashi.
There is a popular legend associated with this temple. The Sun God regularly circumambulated Mount Sumeru. Observing this, Vindhyachal Mountain once asked the Sun, ‘You circumambulate Mount Sumeru; similarly, circumambulate me too.’ The Sun replied, ‘Lord Brahma has instructed me only to circumambulate Mount Sumeru.’ Feeling insulted, Vindhya Mountain started growing taller. The gods became worried and approached Brahma for help. Brahma suggested that
Agastya Rishi, who drank the ocean to eliminate the demon Kalakeya hidden within it, is considered the first among the 18 revered Siddhas of South Indian devotion. Agastya, considered chief among the Saptarishis, 
was the elder brother of Sage Vashishtha. The Rigveda narrates his birth story. It says, ‘Satre ha jātāviṣitā namobhiḥ kumbhe retaḥ siṣicatuḥ samānam ।
Tato ha māna udiyāya madhyāttato jātamṛṣimāhurvasiṣṭham ।।’
(Rigveda 7-33-13). It means, Mitra and Varuna once deposited their vital energy into a pot during a sacrifice, from which Agastya and later Vashishtha were born. Agastya is regarded as the first disciple of Kartikeya, son of Shiv. As Agastya is also one of Shiv’s names, the sage is viewed as an embodiment of Shiv. Since he installed the Shivling here, this pilgrimage became known as Agastyeshwar Mahadev Temple.
The road leading to the temple is narrow, lined by lush trees through which the temple’s spire can be glimpsed. 
A pathway leads from the temple towards the Narmada riverbank. From the entrance, an ascending path with railings on both sides leads visitors toward a spacious courtyard, creating a serene atmosphere amidst natural surroundings. From here, one can also view the Narmada River. The temple courtyard also houses the shrine of Baliyadev.
On the temple’s left side stands a small shrine dedicated to Kedareshwar Mahadev, featuring a self-manifested Shivling. According to legend, a Brahmin of the Shandilya Gotra from Andhra Pradesh, while journeying towards Kedarnath, reached the banks of Narmada, exhausted and hungry. With nothing available to eat, he fell asleep. Lord Kedarnath appeared to him in a dream, saying, ‘O Brahmin, pleased with your devotion, I have arrived here. I brought food for you; wake up and eat.’ Upon waking, he was astonished to find a Shivling manifested near his head. He worshipped it and since then, this Shivling has been called Kedareshwar Mahadev.
The main temple features attractive spires and smaller decorative spires (Upashikhara). The temple comprises an assembly hall (Sabhamandap), vestibule (Antarala) and the inner sanctum (Garbhagriha). Within the assembly hall is a statue of Nandi. The vestibule has shrines of Ganesha on the left and Hanuman on the right. A few steps descend into the sanctum, where a Shivling is centrally located, sheltered by a silver serpent canopy. Nearby is a Shiv mask and the sanctum’s walls display an image of Mount Kailash. Behind the Shivling is a statue of Goddess Parvati.
To the temple’s right side, there is an ashram for pilgrims undertaking the Narmada Parikrama. Beautiful wall paintings depict Goddess Narmada, the story of Agastya drinking the ocean, Shiv and Annapurna Mata, among other narratives. Food arrangements for pilgrims are available at the Annapurna Bhavan here, along with a small dharmashala (guesthouse). Many pilgrims visit this place, especially during the month of Chaitra and the month of Shravan. Kartiki Chaturdashi is celebrated here with special festivities.
