The culture of Nigeria is shaped by Nigeria's multiple ethnic groups. The country has 527 languages, seven of them are extinct. Nigeria also has over 1150 dialects and ethnic groups. The six largest ethnic groups are the Hausa and Fulani in the north, the Igbo in the southeast, and the Yoruba predominate in the southwest, the Tiv people of North Central Nigeria and the Efik - Ibibio.
Located in a valley blanketed by tropical rain forest, the collection of caves has been in use over centuries by local people for whom it has particular spiritual significance. This spiritual significance is still apparent, as the "Ime Ogba" celebration is undertaken every year to commemorate the discovery of the caves.
Abuja is the capital city of Nigeria located in the centre of the country within the Federal Capital Territory (FCT). It is a planned city and was built mainly in the 1980s, replacing the country's most populous city of Lagos as the capital on 12 December 1991. Abuja's geography is defined by Aso Rock, a 400-metre (1,300 ft) monolith left by water erosion. The Presidential Complex, National Assembly, Supreme Court and much of the city extend to the south of the rock. Zuma Rock, a 792-metre (2,598 ft) monolith, lies just north of the city on the expressway to Kaduna.