Dating back to the Mauryan period, Barabar Caves are the oldest rock-cut caves in IndiaThe granitic monolith of Barabar cliff north from the Punpun River near its mouth in Phalgu River resembles a dark, sinister submarine rising from the soil. It is located at the base of the 300 metres high Siddheshwar mountain – interesting place with a later Shiva Temple and remnants of fortification on its top and some ancient cliff carvings as well.
Entrance portals in several caves (Karan Chaupar, Visva Zopri) resemble Egyptian architecture to some researchers. These portals with sloping jambs in the desolate landscape somehow resemble also sights from "Star Wars" movies.
It has been speculated that these circular premises have been inspired by the ancient beehive houses.
The most unusual feature of caves is their echo effect. Vault and the polished walls in the enclosed, small room make perfect conditions for making otherworldly sounds. Most likely the walls were polished exactly for attainment of this echo effect – it must have served well for religious experiences during the chants.