Niger is a state in the North Central region of Nigeria and the largest state in the country. Niger state has three political zones, zone A,B and C. The state's capital is at Minna. Other major cities are Bida, Kontagora and Suleja. It was formed in 1976 when the then North-Western State was divided into Niger State and Sokoto State. It is home to Ibrahim Babangida and Abdulsalami Abubakar, two of Nigeria's former military rulers. The Nupe, Gbagyi, Kamuku, Kambari, Gungawa, Hun-Saare, Hausa and Koro form the majority of numerous indigenous tribes of Niger State. The state is named after the River Niger. Two of Nigeria's major hydroelectric power stations, the Kainji Dam and Shiroro Dam, are located in Niger State, along with the new Zungeru Dam. The Jebba Dam straddles the border of Niger state and Kwara state. The famous Gurara Falls is in Niger State, and Gurara Local Government Area is named after the Gurara River, on whose course the fall is situated. Also situated there is Kainji National Park, the largest National Park of Nigeria, which contains Kainji Lake, the Borgu Game Reserve and the Zugurma Game Reserve. More so, it blessed with a large natural l monolith, or inselberg, an igneous intrusion composed of gabbro and granodiorite. Zuma Rock rises approx. 300 metres (980 ft) above its surroundings