Stock photography, photos: Colonial Slave Cells - Nigeria Stock photos of Children standing in the ruins of former slave holding cells from the 19th century in Akassa. Akassa was an important palm oil processing center and once a transit point for slaves being sent to Badagry and the dungeons of Ghana. Akassa in Bayelsa State of Nigeria, West Africa. Photograph: © Robert Burch Click for a larger image and more information Keywords associated with this stock photo: africa, Nigeria, west africa, delta, nun river, niger delta, bayelsa state, slavery, antique, slaves, colonial, prison, children, kids