Nigeria is West Africa's most visited country, and Africa’s ninth most visited as a whole. It is also Africa's most populous, with more than 140 million people and more than 370 diverse ethnic groups. It is home to Lagos, a city with an estimated population that exceeds 10 million, and therefore is on the United Nations’ list of mega-cities.
Nigeria is located in south-western coastal Africa, and shares its borders with Niger, Benin, Chad, and Cameroon in Central Africa to the south-east. Nigeria’s total land mass covers 923,768km and is five times larger than Ghana, 13 times as large as Sierra Leone and occupies a seventh of West Africa.
The country is home to about 371 different and distinct tribes, the largest of which are the Hausa and Fulani (in the north), the Yoruba (in the south-west), and the Igbo (in the east).
Nigeria is divided into 36 colourful states and each state enjoy a high degree of autonomy. They can set industrial policies and independently seek to attract investment. This is usually done within the broader national policy and must comply with federal rules (with regard to import duties, for example).