Heidelberg, located along the scenic banks of the Neckar River in southwestern Germany, is a city steeped in history, culture, and charm. Known for its prestigious university, which is one of the oldest in Europe, the city draws visitors with its picturesque old town, medieval architecture, and vibrant academic atmosphere.

King's Wharf is the largest and most active port in Bermuda, with a high volume of cruise ship and ferry traffic. Shopping, restaurants and museums are close by.

Šiauliai, often referred to as the "City of the Sun" due to its high number of sunny days, is a vibrant gem in northern Lithuania. The city's most iconic landmark is the Hill of Crosses, a profound site of pilgrimage adorned with thousands of crosses placed by visitors over the decades. This unique and moving monument, which has been recognized by UNESCO for its cultural significance, symbolizes the resilience and spirit of the Lithuanian people.

Tonga is distinctly different to its neighboring island nations. This Polynesian kingdom, made up of 170 islands, carries a proud history that dates back over 3,000 years. On the main island of Tongatapu, travelers can explore ancient stone structures like the Haʻamonga ʻa Maui Trilithon—sometimes called the Stonehenge of the Pacific. Royal tombs in Lapaha offer a glimpse into the lineage of Tonga’s kings, while village life remains guided by customs that have changed little over centuries.

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.