Capital of Misiones, and a base for visiting the ruins of the Jesuit missions after which the province is named, Posadas is a modern city that gazes across the wide Río Paraná to Encarnación in Paraguay. Brightly colored street signs vie for attention on the bustling, humid streets, and shady trees stand guard in the several parks and plazas. Posadas is a stopover for travelers on their way north to Paraguay or Iguazú but has plenty of charm of its own, if little in the way of sights.
Posadas was the gateway to the pioneering agricultural communities of interior Misiones and in 1912 was linked with Buenos Aires by the Urquiza railway. The city lost some of its low-lying areas to flooding from the Yacyretá dam, a major hydroelectric project completed in 1997 that forced the relocation of 40, 000 people.