With 586,528 km2 (greater than France), it is the fourth most extensive state in Brazil. The main producer of coffee and milk in the country, Minas Gerais is known for its heritage of architecture and colonialart in historical cities such as Ouro Preto, Diamantina, Tiradentes and Mariana. In the south, the tourist points are the hydro mineral spas, such as Caxambu, São Lourenço, Poços de Caldas, São Thomé das Letras, Monte Verde and the national parks of Caparaó and Canastra. The landscape of the State is marked by mountains, valleys, and large areas of fertile lands. In the Serra do Cipó, Sete Lagoas, Cordisburgo and Lagoa Santa, the caves and waterfalls are the attractions. Some of Brazil's most famous caverns are located there. In recent years, the state has emerged as one of the largest economic forces of Brazil, exploring its great economic potential.