Built in 1913 as a private home — named for the owner’s time in Argentina — and now restored by Croatian firm 3LHD using locally sourced stone, wood, and ceramics, with over 14,000 Mediterranean plants in the grounds. It sits on a limestone bluff with a 200-foot stretch of Adriatic shoreline and direct views of the medieval walls and the island of Lokrum; the lead architect grew up in the neighborhood.