It is a national park in the province of Corrientes in Argentina, located in an area of great biodiversity with a variety of environments including marshes, lakes, grasslands and palm groves. It is close to the town of Mburucuyá, where you can find basic services such as shops, a petrol station, places to eat and accommodation.
To reach the protected area from the town of Mburucuyá take Provincial Route 6, which is a gravel road, and then Provincial Road 86 which has sections of gravel and dirt/sand (keep in mind that it can become difficult or even impassable if it rains or the road is wet). From that junction, it is about 16 km to the park's recreational area, where there is a visitor center located in the former main house of an old ranch. There is also a campground with parking, covered picnic shelters with wooden tables and benches, barbecue grills, showers and electricity. There is plenty of space to pitch a tent and spend the night comfortably.
The park has several trails that allow visitors to explore different parts of the protected area. One of them, called Yatay, is a long trail that passes through palm groves and reaches a pier on the shores of the Santa Lucía marshes.
It is a highly recommended destination for anyone interested in wildlife watching, especially birds, mammals and reptiles. It is common to see capybaras, gray brockets (deers), foxes, and black yacarés in the waterways. Many species can be seen with great ease, even around the campground and its surroundings. It is also common to spot wildlife while driving along Provincial Road 86 which crosses the park.