Courtyard of Elmina Castle, Ghana (www.aluka.org)
Originally uploaded by Aluka Digital Library
This is the courtyard of Elmina, in Ghana, which qualified as a trading post for a period until it was eventually used as a major depot on the slave trade. This courtyard would have been one of the last views newly captured slaves would have had of Africa before departing for the New World.
A shameless plug here, but this can also be found on Aluka.