Uyuni, in southwestern Bolivia, is best known as the gateway to the world’s largest salt flat, Salar de Uyuni. Once a humble railway town, Uyuni has grown into a base for travelers drawn to this surreal landscape, where an ancient dried-up lake has left behind a vast expanse of glistening salt crust.

Sitka is accessible only by air or sea, giving visitors a real taste of this wild frontier. Sitka offers incredible scenery, fishing, hiking, and abundant wildlife. 22 of Sitka's buildings and monuments appear in the National Register of Historic Places.

Rijeka sits at the head of Kvarner Bay on Croatia’s northern Adriatic, shaped by its long role as a port city at the crossroads of empires.

This small yet charming city in Alaska's panhandle is a throwback to the gold rush era. Skagway is a well-preserved part of Klondike Gold Rush National Historical Park.

Cagliari is Sardinia's capital and largest city. Several civilizations have left their imprint here architecturally and culturally. Must-sees include the Museo Archeologico Nazionale di Cagliari, with its Roman and Byzantine treasures, as well as Castello, a medieval quarter situated on a hill above the city. The city is also known for its food and vibrant nightlife.