The island of São Tomé, with its capital of the same name, represents 90 per cent of the total surface of the country. São Tomé is a picturesque town, with colonial Portuguese architecture and attractive parks. There are a number of roças (cocoa plantations) on the island that are worth visiting: Agostinho Neto, the largest plantation in the country, is a clear example of São Tomé’s colonial past; other roças are Agua Izé, where visitors can tour the plantation by train, Monté Café and Ribeira Peixe. Other attractions on the island include the Boca de Inferno (Hell’s Mouth), a sea water fountain several meters high; the Cascada São Nicolãu waterfall near Pousada Boa Vista; the Ilheu da Rolas (Turtledove Island), a small island off São Tomé crossed by the equator; the Pico de São Tomé, the highest mountain in the archipelago (2024m/6800ft); the Porto Alegre, on the southern tip of the island; the ancient fishing town of São João dos Angolares; and the fortress of São Sebastião, which also houses a museum with a collection of religious and colonial art.