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While the free guided tours of Casa Iberá (M-Sa 07:00-13:00 and 17:00-21:00) are best suited for school groups, the Cultural Fridays are a great way to witness (and sometimes taste) at bit of the region's culture. Follow their Facebook page for the latest schedule. Admittance is free, the free tickets are handed away on the days preceding the event, but if you're a far-flung visitor, they might be willing to accommodate you.
© OpenStreetMap contributors
Square 25 of May
The city's main square. Close to the Paraná river and to the Port of Corrientes, it's in front of city hall.