Bihar has one national park, Valmiki National Park. It’s located in the West Champaran district and is a tiger reserve. The park covers 898.45 km2 (346.89 sq mi), which is 17.4% of the district’s total geographical area. As of 2022, there were 54 tigers in the reserve.
The park is located in the foothill ranges of Siwaliks at the Indo-Nepal border. The River Gandak (called ‘Narayani’ in Nepal) forms its western boundary. There are many historical sites around the national park