Comoros
Tiny Indian Ocean Island group between Madagascar and Mozambique
Burundi
On the shores of Lake Tanganyika, it's the beating heart of Africa. Holds the source of the famous Nile River.
South Sudan
The world's newest country, split off from warring neighbor Sudan in July 2011
São Tomé and Príncipe
Tiny islands in the Gulf of Guinea
Republic of the Congo
Huge tracts of forest with a small population mean great potential for eco-tourism, but the country is still to fully recover from a terrible war in the 1990s
Gabon
Has escaped the strife afflicting other Central African states, rich in oil and mineral reserves and a high biodiversity.
Equatorial Guinea
Perhaps one of the continent's most corrupt countries, where massive oil wealth is confiscated by a thuggish government, is not a terribly safe place to travel, but it has great beaches, laid-back beach bars, and locals speak Spanish.
Democratic Republic of the Congo
Huge, blessed with incredible natural wealth and beauty, culturally diverse, and is developing extremely fast though it's still a quite poor country.
Central African Republic
Dense jungle in the south and semi-arid in the Sahelian north, this very unstable country is very much off the radar for visitors.
Angola
Former Portuguese colony which went through a brutal civil war. Now largely safe, but has been surprisingly slow to appear on the tourist radar