Answer: Yamuna
Notes: Recently, Purana Qila was handed over to the Sabhyata Foundation of the Dalmia Group under the 'Adopt a Heritage' scheme by the Ministry of Tourism. Located in New Delhi, it's one of the oldest forts built on the banks of the Yamuna River, also known as Qila-e-Kohna. Built under Humayun and Sher Shah Suri, it reflects a blend of Islamic and Hindu architecture. The rectangular fort boasts three gates, notably the Bara Darwaza, combining Islamic and Hindu elements.
