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.

Sarajevo, the capital of Bosnia and Herzegovina, is a city where history, culture, and resilience converge. Often called the "Jerusalem of Europe," Sarajevo is a place where East meets West, reflected in its diverse architecture, which seamlessly blends Ottoman, Austro-Hungarian, and modern influences.

Situated at the foot of Mont Collon, the small village of Arolla is a popular starting point for summer mountain hikes as well as a common stop on the Chamonix-Zermatt Haute Route expeditions. In the winter, it's a small ski resort with five lifts and guaranteed snow thanks to the elevation.

Kagoshima, Japan offers a captivating blend of natural beauty, cultural heritage, and culinary delights. Nestled on the southwestern tip of Kyushu, this city is famously dominated by the imposing Sakurajima volcano, one of Japan’s most active volcanoes. Visitors can take a ferry to get up close to the volcano or view it from the Kagoshima City Viewpoint for breathtaking panoramic views.

Portland, Oregon, is a city where natural beauty and urban innovation coexist harmoniously. Nestled between the Columbia and Willamette Rivers and framed by volcanic mountains, Portland offers an array of outdoor adventures alongside its renowned cultural scene. Visitors can explore the lush expanses of Forest Park, one of the largest urban forests in the U.S., or take a leisurely stroll through the Portland Japanese Garden, which showcases exquisite traditional Japanese landscape design.