Thanks to the implementation of a coastal highway in the 1980s and the government's subsequent infrastructure investments, Natal is now the largest city in Brazil's Rio Grande do Norte. Visitors are drawn to its beautiful beaches, white sand dunes and a diverse cultural experience. The city also lays claim to having some of the cleanest air on the continent as well as the world's largest cashew tree, the Cajueiro de Pirangi, which produces roughly 70,000 nuts annually.