Evening light sweeps over the ruins of the Jesuit mission at Trinidad de Paran&aacute; (Parana with acute accent on final a), Paraguay. Scores of Jesuit missions in the area where Paraguay, Argentina and Brazil meet were built in the 17th century and abandoned when the Jesuits were expelled in the 18th century. Ruins of some of these missions still haunt hilltops in the region. (Kevin Moloney for the New York Times)