The other day I did a free downtown tour, watched tango, had chocolate con churros at Cafe Tortoni, and visited the Museum of Fine Arts.
Then I flew to Posadas and toured ruins of San Ignacio Mini, a Jesuit mission.
Country 4 was Paraguay, reached by a crowded publib bus from Posadas. I toured two Jesuit missions there. I do love ruins. Then by bus to Ciudad del Este where I taxied to Brazil.