On a promontory above the Río Paraná, 30 miles from Iguazú Falls, the last outpost of the once-powerful Bemberg family sits within 1,000 acres of private jungle. The colonial-style villa of the Posada Puerto Bemberg, its colonnaded verandas cooled by fans, has 14 robustly furnished rooms that open onto exuberant gardens of canna and guadua bamboo. Knowledgeable staff rush to dig out books on native fauna from the 2,500-volume library, and housekeepers drop their brooms to point out a sayaca tanager's nest or an earpod tree. Explore the Paraná's tributaries in the hotel's launch. And if the steamy climate gets to be too much, sip tereré, an ice-cold version of green Argentine tea, on an observation deck built at the height of the tree canopy.
When to go: Hot and humid year-round, the region can be stifling in summer (Dec.-Feb.).
Which room to book: The suite, for a commanding river view from its private terrace