Kashtaharni Ghat is a holy place of Munger district. It is said that once upon a time Lord Ram and Mata Sita bathed at this site while returning to Ajodhya from Mithila, after that this place becomes a holy place. This place is also famous as pilgrim centre for Hindu religion. The word Kastaharni meaning the bathing place which expels all pain. Manpathar is a very popular place, which situated near the Ghat.
The Ganges river that flows in front of Munger is Uttar Vahini for which it has got great importance.There is a cluster of six temple. It is believed that in the 16th century A.D, a Hindu sage, named Mudgal Muni, appeared in the city and established two shrines, one at a rock at Kashtaharini Ghat. It is said that Lord Rama has rested here with his Consort Sita after crossing the stream on their way back from the encounter with Taraka, the demoness. The relaxation they had, gave rise to the name of Kashtaharini Ghat stands. It is believed that – One who takes a dip in this ghat receives solace and cure from bodily pains. The sanctity of the place may be of considerable antiquity, as is perhaps indicated by the inscription of the Gahadvala King Govind Chandra of Kanauj, which records a grant made by the king after bathing in the Ganges at Mudgagiri on the occasion of Akshaya Tritiya festival. On the wall of the gateway near the ghat is an inscription of about the 10th century A.D. which mentions the king Bhagiratha and the construction of a Siva temple.
Numerous carvings and sculpture have been discovered from this area by Bloch in 1903. An inscribed image of Dhyani Buddha bearing the usual Buddhist Creed is now in the Indian – Museum, Kolkata.
According to Jayaswal Research Institute Archaeological Explorations this site belongs to Early medieval period.