Cuba has been described as the gem of the Caribbean with its mist-shrouded mountains, orchid-filled forests and astounding European architecture springing up unexpectedly in the tropics. At the turn of the 20th century, the capital city, Havana, was one of the grandest and most important Latin American city in terms of architecture. The buildings from this boom period, known as vacas gordas (fat cows), demonstrate the international influences of art nouveau, art deco and eclectic. Havana was the most popular exotic destination for Americans during the forty years between World War I and Castro's revolution. The sensuous Havana of the '50s, where Frank Sinatra sang at the Tropicana and Ernest Hemingway dined at El Floridita, was a playground made of glittering nightclubs, outrageous cabarets, all-night bars, and backstreet brothels.