Symmetrical Design: The caves are renowned for their highly polished, symmetrical architectural designs. The interiors are smooth and shiny, often compared to the polish of glass. This reflects the advanced level of craftsmanship achieved by artisans of that era. The precision in symmetry not only enhances the aesthetic appeal but also serves to amplify the sound within the caves.

Architectural Layout:

The layout of the Barabar Caves typically includes a rectangular hall with a circular dome-shaped chamber (stupa) at the far end. The caves' entrances are usually smaller compared to the inner chambers, which are spacious with high ceilings. The symmetrical architecture is thought to symbolize the order and harmony of the universe, a concept that was significant in ancient Indian cosmology.

Acoustic Properties: The caves have remarkable acoustic qualities. The inner chambers are designed in such a way that sound resonates across the smooth walls, creating a reverberating effect.