Nigeria's most expansive topographical region is that of the valleys of the Niger and Benue river valleys (which merge into each other and form a "y" shape). To the southwest of the Niger is "rugged" highland.
Gabon is located on the Atlantic coast of central Africa. Located on the equator, between latitudes 3°N and 4°S, and longitudes 8° and 15°E. Gabon generally has an equatorial climate with an extensive system of rainforests covering 85% of the country.
Bhutan is located on the southern slopes of the eastern Himalayas, landlocked between the Tibet Autonomous Region to the north and the Indian states of Sikkim, West Bengal, Assam, and Arunachal Pradesh to the west and south.