São Tomé Capital.
North: São Tomé
"The national park is known internationally amongst conservationists for its biologically rich dense virgin rainforests. It is also characterized by a wide range of biotopes, from lowland and mountain forests, to mangroves and savanna area, which contribute to its unique ecosystem. The park includes virgin Atlantic high altitude rainforest and secondary rainforest (known to locals as capoeira) which contains abandoned plantations.
In 1988, scientists classified the forests of São Tomé and Príncipe as the second most important in terms of biological interest out of 75 forests of Africa; most of the species found in the islands are found in the national park". Wikipedia
South: Porto Alegre