The Kolhua site. "Kolhua is the only place from Bihar on the list. Located around 65km northwest of Patna, Kolhua has an Asokan pillar, an ancient Buddhist stupa, a water tank, an abode where Lord Buddha spent several rainy seasons and two monasteries. Buddhist texts suggest, he (Buddha) made a prophesy of his own mahaparinirvana (liberation) and its date to his disciples while staying at Kolhua. The ASI also plans to clean up the inbuilt outlet channel of the ancient tank, which was designed to check it from overflowing.

Source: The Telegraph December 06, 2017 21:59 UTC