This was the first Anglican cathedral in East Africa and its crucifix was carved from the tree under which explorer David Livingstone's heart was buried in the village of Chitambo. Built in 1887 to mark the end of the slave trade, the cathedral's high altar was constructed on the site of a whipping post. Nothing of the slave market remains, although nearby are underground chambers in which slaves were forced to crouch on stone shelves less than 2 feet high. Take a guide with you as there is very little information on site and with such a poignent space you would want to get as much infomation as possible.
Off Creek Rd., Zanzibar, Tanzania