Le musée d'histoire de Ouidah (The Ouidah Museum of History) is located within the Old Portuguese Fort in Ouidah. The Fort was used to contain and transport enslaved Africans as part of the transatlantic slave trade, serving as the site for diplomatic presence of Portugal in the area. The fort became property of the Dahomean government in 1961, when it was restored and turned into a museum, opening in 1967. It is managed by the Department of Cultural Patrimony.

The museum's collections are grouped into six major exhibit themes: the Portuguese Fort (in which the museum resides), the Kingdom of Xwéda, the Kingdom of Dahomey, the Slave Trade, Vodun, and the cultural links between Benin and the New World. These collections are made up of artefacts, photographs and objects that have significant meaning to the history and culture of the museum's local area.

The history of slavery runs throughout the displays; from the Portuguese Fort display which discusses how enslaved Africans were kept there. The displays that explore the kingdoms of Xwéda and Dahomey use collections to emphasise the extent to which both of them were dependent on the trade in enslaved individuals with Europeans for riches and power. These include a range of archaeological finds, as well as engravings and drawings. The exhibition about the religious traditions of the area, in particular the development of Voodoo, reflects on the continued use of African religions by enslaved people in the Americas during the period of the transatlantic slave trade, using religious artefacts. A range of images and objects showcase the impact that people from Benin made on the cultures of New World societies, as well as the effects of mass repatriation to Benin after the decline of the slave trade.

The Slave Trade exhibits examine the system of transatlantic slavery from the sixteenth to the nineteenth century and how it impacted on the local area. The main focus is on the economic and social processes that the slave trade created in Benin, capture, enslavement and the Middle Passage. These themes are illustrated with a range of objects, artists' renditions and archival materials. Examples of objects on display include chains and yokes. Images are also used to give some information about the plantation system in the Americas and Caribbean.

Cape Coast Castle is one of around forty ‘slave castles’ built by European traders on the coast of West Africa and used to hold enslaved Africans prior to their being transported to the Americas or the Caribbean. The first timber construction on the site was erected in 1653 for the Swedish Africa Company named Carolusborg. It was later rebuilt in stone. In April 1663 the ‘Swedish Gold Coast’ was seized by the Danes and integrated into the ‘Danish Gold Coast’. In 1664 it was conquered by the British. Originally used for trade in timber and gold, the castle was later used in the transatlantic slave trade. In the late 18th century it was rebuilt and used as the seat of the colonial Government of the British Gold Coast in 1844. In 1957, when Ghana became independent, the site came under the care of the Ghana Museums and Monuments Board, and was restored for public access in the 1990s. The museum offers guided tours, as well as permitting tours orchestrated by freelance tour guides. There is also a library and a gift shop, featuring traditional Ghanaian arts and crafts, on site.

The main aim of the museum is to act as a monument to those taken from Africa and enslaved into the system of Transatlantic Slavery. It features both archaeological and ethnographic collections on displays, within the rooms of the castle. Throughout, there are also a number of contemporary sculptures depicting the heads of victims of the slave trade. Visitors tour through the castle, encountering the rooms in which the enslaved were held, with guides providing further information about the conditions and experiences those thousands of Africans faced.

This exhibition and education programme explored connections between transatlantic slavery and the London Borough of Richmond. This included a study of the West Indies connections in Richmond, local residents involved in abolition, and the historical presence of black people in the area. It also examined the slave forts on the coast of Ghana. 'Richmond Voices' introduced local residents who were of African or African-Caribbean descent. The accompanying booklet was written by Valerie Boyes, and produced in collaboration with the Richmond Local History Society.