Located roughly in the center of the country, Riobamba is one of Ecuador's largest cities and the starting point of the scenic train ride to Nariz del Diablo (Devil's Nose). The city has a strong indigenous presence, which lends itself well to the open-air artisan market, and plenty of opportunities for mountainous activities such as hiking and mountain biking.

Coursing through 10 countries, the Danube is the second-longest river in Europe. This waterway, lined with fortresses and castles, rises in Germany's Black Forest and runs for 1,770 miles to the Black Sea. The Danube is an essential commercial thoroughfare for central and southeastern Europe, and several river cruise companies sail vessels on it year-round. Destinations along this river include Vienna, Budapest, Passau and Bratislava.

The Whitsunday Islands sit in the heart of Australia’s Great Barrier Reef, where more than 70 islands rise from wide blue seas and offer an invitation to explore. Whitsunday Island itself is the largest of this group, known internationally for its ribbon of white silica sand stretching over seven kilometers at Whitehaven Beach. This sand feels cool underfoot even in warm sunshine because it’s made of nearly pure silica carried there by ancient ocean currents.

Cambodia, located in Southeast Asia, is a country known for its rich history, ancient temples, and vibrant culture. The landscape is diverse, with the Mekong River flowing through fertile plains, lush forests, and scenic highlands.

Nestled in the Andaman Sea, Langkawi is an idyllic island escape renowned for its pristine beaches, lush landscapes, and vibrant culture. This Malaysian archipelago, comprising over 100 islands, boasts a range of natural wonders, including the Langkawi Sky Bridge, an architectural marvel suspended 700 meters above ground.