The Darvaza Gas Crater, famously nicknamed the “Door to Hell,” is one of Turkmenistan’s most extraordinary landmarks. Located deep in the Karakum Desert, this fiery pit has been burning continuously since the early 1970s, when Soviet engineers reportedly set fire to a collapsed natural gas field to prevent the spread of methane.

Asmara, the capital of Eritrea, is a city where time seems to have paused in the mid-20th century. Known for its remarkably preserved Italian modernist architecture, the city has earned recognition as a UNESCO World Heritage Site.

Oviedo, the capital of Asturias in northern Spain, offers a rare mix of medieval heritage and everyday life that feels rooted rather than staged. The city’s historic center is home to some of the oldest pre-Romanesque buildings in Europe, including the UNESCO-listed Santa María del Naranco and San Miguel de Lillo. Cider, not wine, defines the local table. Oviedo is surrounded by apple orchards, and the traditional drink, sidra natural, is poured from a height by skilled escanciadores.

Flanked by the Chilean Coast Range and the snowy Andes, Chile's largest metropolis offers a dazzling array of sights and attractions for visitors to pursue. Mirrored skyscrapers, 16th-century churches, hip cafes, dance clubs... and did we mention the delicious Chilean cuisine?

Set on the Adriatic Sea, Zadar, Croatia, is a major Dalmatia historical center and a tourism magnet. Walk ancient streets, see Roman ruins and enjoy white-sand beaches.