リオ・ムニ
On the continent, Río Muni covers . The coastal plain gives way to a succession of valleys separated by low hills and spurs of the Crystal Mountains. The Rio Benito (Mbini) which divides Río Muni in half, is unnavigable except for a 20-kilometer stretch at its estuary. Temperatures and humidity in Río Muni are generally lower than on Bioko Island.