A cargo vessel with passenger facilities, the last working Royal Mail Ship operates a shuttle service from Cape Town to St Helena and Ascension Island, with occasional forays to the linked British Overseas Territory of Tristan da Cunha. Cabins are basic and the ship offers a utilitarian ferry service rather than a sophisticated cruise. But it’s a unique journey, and the opportunity to make it will disappear once St Helena’s airport opens in 2016. A real individual in the cruise world. Gratuities not included.