When the pressures of city living grow great, porteños escape to the suburbs and countryside of Buenos Aires Province, and across the river to Uruguay.

When the capital swelters in summer heat, the Paraná Delta’s maze of forested channels is just close enough for an afternoon off, but there’s plenty to do for a day trip, a weekend, or even longer. Fewer than 4,000 people, many of whom traditionally bring their produce to Tigre’s Mercado de Frutos, live in the 950 square kilometers of “the islands.”