Corrientes, the capital of its namesake province, is one of Argentina’s oldest cities. The General Belgrano Bridge over the Paraná River joins the city to Resistencia, the capital of the Chaco Province (see above). Among Corrientes’ oldest churches, the Santísima Cruz de los Milagros and the Convento de San Francisco are worth a visit. In the north of the province lies the Esteros del Iberá, an area of marshland, lagoons and lakes providing a refuge for hundreds of bird species, reptiles and mammals such as swamp deer and capibara (the world’s largest rodent). There are numerous remains of Jesuit settlements in the vicinity, notably at Yapeyú, the birthplace of José de San Martín. Cattle ranches (estancia) can be visited at San Gará, Atalaya and San Juan Poriahú. Well known for its fiestas and carnivals, the Corrientes is also the land of the chamamé, a characteristic type of rhythmic music derived from the polka, celebrated in the annual National Chamamé Festival.