Palacio Duhau - Park Hyatt Buenos Aires

This Park Hyatt feels like two hotels in one. The original 23-room mansion, built in 1934 by French architect Leon Dourge, defines Belle Epoque elegance with elaborate ironwork, glass chandeliers, and Persian rugs. Next door is the 142-room Posadas building, a sleek and minimalist tower that opened in 2006. What unites the two spaces—in addition to an underground gallery with rotating art—is impeccable service that elicits kudos from even the most discerning globetrotters. And while the rooms’ appearances vary according to their era (hardwood floors and silk curtains in the Palacio, a natural palate and contemporary furniture in Posadas), all have the highest-end technology, rain showers, soaking tubs, and bathrooms bedecked in Travertino marble. At Vinoteca lounge, a sommelier and maitre fromager pair wines from among 3,500 bottles of Argentine vintages with regional cheeses and chutneys.