Caye Caulker lies off the coast of Belize, a small island that was once a quiet fishing village and today still feels wonderfully uncrowded compared to many Caribbean destinations. Its name likely comes from an English twist on “Hicaco,” the old Spanish name meaning coco plum, a nod to the island’s early days and bilingual roots.

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.

Iceland, a land of extraordinary contrasts and natural wonders, offers an experience unlike any other. Its dramatic landscapes are defined by active volcanoes, geysers, and sprawling glaciers, all set against a backdrop of ethereal Northern Lights. A must-see is the Golden Circle, a popular route encompassing the Thingvellir National Park, the geothermal area of Geysir, and the majestic Gullfoss waterfall.

Berlin has an undeniable history. The horrors of World War II, division, reunification, revolution all profoundly impacted the city in the 20th century. Today, visitors will find a sophisticated, high-energy city with endless cultural, architectural and gastronomic attractions.

Nature is never far in Helsinki. Locals swim in the sea, walk forested trails, and gather mushrooms or berries all within city limits. One popular local habit is heading to the sauna, and the city offers several open-to-the-public options. Löyly, located on the waterfront, combines traditional wood-burning saunas with a sleek, modern design. In winter, visitors can even pair a sauna session with a quick dip through a hole cut in the ice for an experience both shocking and strangely calming.