Patalpuri Cave, Bhagalpur, Bihar The Patharghat Hill caves are a group of ancient rock-cut caves located on a hill facing the Ganges River near Kahalgaon in Bhagalpur district, Bihar. The site has seven caves, with the largest known as Patalpuri Cave, a natural rock fissure of large size, reached by steps carved into the hillside. The caves are set in the Rajmahal trap rock formations and are historically important for ritual and meditation use, possibly linked to ascetics. Along the northern rock faces near the summit is a continuous series of carved figures and scenes. These depict mythological themes and incarnations of Vishnu, dating to around the 7th-8th century CE. Today, the caves and the hill are valued for their archaeological and religious importance. Nearby temples and annual fairs, including those held during Shivratri, draw devotees to the site. Source: Archaeological Survey of India