The main village is Isla Mayor, about 45 km south west of Sevilla, The small village of
Poblado de Alfonso XIII is in the same municipality. Isla Mayor separated from the municipality of Puebla del Río in 1994. Isla Mayor is situated in the
Las Marismas (marshes) of the Bajo Guadalquivir River, of which one part forms part of the
Doñana National Park. The land is formed from sediment at the mouth of the
Guadalquivir river. It is crisscrossed by canals, with the land dedicated primarily to the cultivation of rice. Previously just a seasonal settlement for workers in the rice harvest, it became a permanent settlement in 1956 with the establishment of a paper factory by the
Instituto Nacional de Colonización. The village and municipality were known as Villafranco del Guadalquivir, in honour of
dictator Francisco Franco. In 2000, the town was renamed "Isla Mayor" by popular vote. ==See also==