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.

Milos is one of the most striking islands in the Aegean Sea, known for its otherworldly landscapes, turquoise coves, and centuries-old history. Shaped like a horseshoe, the island was formed by volcanic activity which left behind dramatic cliffs and hidden beaches carved from soft white rock. Visitors often find their first glimpse of Milos unforgettable, especially at Sarakiniko Beach where smooth, chalk-white formations contrast with the vivid blue water.

Alajuela, Costa Rica’s second-largest city, offers a mix of history, culture, and natural wonders that make it more than just the gateway to Juan Santamaría International Airport. The city’s central park, cathedral, and museums create a lively hub where local life unfolds, from weekend markets filled with fresh produce to festivals celebrating music and tradition.

Fuerte Amador is a waterfront district located at the Pacific entrance of the Panama Canal in Panama City. Built on a causeway created with rock excavated during canal construction, the area links four small islands: Naos, Perico, Culebra, and Flamenco.

León, in northwest Spain, is a city where Roman, medieval, and modern layers coexist. Its historical heart features the León Cathedral with its remarkable stained glass, the Basilica of San Isidoro, and winding streets that hint at centuries of trade and culture.