São Tomé and Príncipe, an African island nation close to the equator, is part of a volcano chain featuring striking rock and coral formations, rainforests and beaches. On the larger island, São Tomé, is the Lagoa Azul lagoon. Ôbo Natural Park, a biodiverse jungle preserve, covers much of São Tomé and is distinguished by Pico Cão Grande, a skyscraperlike volcanic rock.