Islas de Santa Fé National Park, National park in San Jerónimo Department, Argentina.

Islas de Santa Fé National Park comprises eight fluvial islands within the Paraná River, where wetlands, forests, and waterways create a layered landscape. This mosaic of habitats supports diverse wildlife populations throughout the protected area.

The reserve El Rico, created by Santa Fe decree 4070/1968, became the core of the park. In 2009 the province transferred its domain and jurisdiction to the nation, and on 13 October 2010 Congress passed law 26.648, promulgated on 15 November, creating the park from about a dozen islands totalling 2,900 hectares. Sebastián Gaboto had founded Fort Sancti Spiritu nearby in 1527.

The park's name comes from the Spanish word for islands, and its waterways are home to the irupé (Victoria cruziana), a giant water lily whose Guaraní name means "water plate" because of its round, floating leaves. The carpincho, the world's largest rodent, lives in family groups here and barks to warn others before diving into the water.

The park lies opposite Puerto Gaboto, about 50 km north of Rosario and 60 km south of Santa Fe, reached by boat along the Paraná and Coronda rivers and the El Ternero stream. Puerto Gaboto has inns, camping areas and riverside fish restaurants, and service stations line the Rosario–Santa Fe motorway. The islands flood periodically in autumn and summer, so check river levels before setting out.

The irupé (Victoria cruziana) is among the world's largest aquatic plants; its circular floating leaves reach up to two metres across, and its name in Guaraní means "water plate". Its flowers open white and turn pink. The photograph shows the pads' upturned, ribbed rims and a closed yellow bud on its stem.