This is supposed to be one of the biggest and most busy Sea Ports in West Africa but it was abandoned in 1959 just after the water way was approved as a designated area for building a sea port. It is called the Oseakwa seaport, located in Akwa community, Ihiala Local Government Area of Anambra State, Nigeria. The story of this abandoned seaport is pathetic. It was witnessing massive activities even before the turn of the 20th century up until 1956 when it was abandoned. It was a transit route for trading in the booming palm oil business back then, including slave trade. Its importance led to the designation of the area for development of a sea port that never saw the light of the day.
This video contains interesting information about the great Oseakwa Seaport.