São Tomé Island, the larger of the two islands in São Tomé & Príncipe, offers travelers a balance of culture, history, and dramatic natural scenery. Its capital, São Tomé city, is a coastal hub filled with colonial architecture, lively markets, and a welcoming atmosphere.

Hellesylt, a small village on Norway’s western coast, sits at the entrance to the famous Geirangerfjord and offers scenery that feels almost otherworldly. Steep mountains rise sharply on all sides, their slopes cut by ribbons of waterfalls that plunge into deep blue water. One of the most striking sights is the Hellesylt Waterfall, which thunders past the heart of the village and can be admired from several pedestrian bridges.

Together with neighboring Glacier National Park in the United States, Waterton Lakes National Park is part of the world's first international Peace Park, which was recognized as a UNESCO World Heritage Site in 1955. The Waterton-Glacier Peace Park protects an important biological crossroads where the Rocky Mountains reach their narrowest width. Waterton's bedrock is much older than that of the mountains to the north found in Jasper and Banff.

Barranquilla sits near the mouth of the Magdalena River on Columbia's Caribbean side. It is a major seaport and a center of commerce, but everyone breaks loose for four days in February for one of the liveliest carnivals outside of Rio.

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.