Opatija, located on Croatia’s Kvarner Bay, has been drawing visitors since the 19th century, when Austro-Hungarian aristocrats built grand villas along its Adriatic shoreline. Today, many of those same buildings still stand with some restored as luxury hotels and others preserved as cultural landmarks. The town’s most recognizable structure, Villa Angiolina, opened in 1844 and marked the start of Opatija’s rise as a fashionable seaside resort.

Milford Sound, located in New Zealand’s Fiordland National Park, is often described as one of the most awe-inspiring landscapes in the country. Carved by glaciers during the Ice Age, the fjord is framed by sheer cliffs that plunge into deep waters, with iconic peaks like Mitre Peak rising dramatically above the sound.

Its legacy as the former imperial capital of Vietnam is just one of many reasons to visit Hue. For more than a century, the emperors of the Nguyen dynasty (1802-1945) ruled from the Forbidden Purple City, the innermost enclosure of the citadel. Today, this complex is designated as a UNESCO World Heritage site and draws millions of visitors each year.

Whittier is the perfect place to explore Alaska's natural beauty, providing access to nearby Emerald Cove Trail and Portage Pass Trail as well as Chugach State Park further northwest.

Santiago, the cultural capital of Cuba, is a passionate, unique destination, second in size and importance only to Havana, the governmental capital of the island. Some of Cuba's most famous musicians were born here, as well as the Bacardi brand of spirits, and the UNESCO World Heritage describes the local citadel of San Pedro de la Roca as "the most complete, best-preserved example of Spanish-American military architecture."