The Barabar Hill Caves - Credit: Wikimedia Commons
The Barabar Hill Caves (Hindi बराबर, Barābar) are the oldest surviving rock-cut caves in India, dating from the Maurya Empire (322–185 BCE), some with Ashokan inscriptions, located in the Makhdumpur region of Jehanabad district, Bihar, India, north of Gaya. Read more on Wikipedia
Source: en.wikipedia.org