Rio Grande do Norte is one of the states of Brazil, located in the northeastern region of the country, occupying the northeasternmost tip of the South American continent. Because of its geographic position, Rio Grande do Norte has a strategic importance. The capital and largest city is Natal. It is the land of the folklorist Luís da Câmara Cascudo. Its 410 km (254 mi) of sand, much sun, coconut palms and lagoons are responsible for the fame of beaches. Rocas Atoll, the only such feature in the Atlantic Ocean, is part of the state. The main economic activity is tourism, followed by the extraction of petroleum, agriculture, fruit growing and extraction of minerals, including considerable production of seasalt, among other economic activities. The state is famous for having many popular attractions such as the Cashew of Pirangi, the dunes and the dromedaries of Genipabu, the famous beaches of Ponta Negra, Maracajaú and Pipa's paradise, the Carnatal the largest off-season carnival in Brazil, the Forte dos Reis Magos is a sixteenth-century fortress, the hills and mountains of Martins, the Natal Dunes State Park the second largest urban park in the country, and several other attractions. The state is also closest to the archipelago of Fernando de Noronha.