Located in central Germany, Frankfurt is a vibrant cultural and economic hub nestled on the Main River. Museums and architectural gems abound in Frankfurt, from the Goethe House, to the picturesque timber houses of Römerberg town square, to the Museumsufer, a collection of museums lining the banks of the Main.

Hidden in the northern region of Costa Rica, the Celeste River (Río Celeste) winds through Tenorio Volcano National Park with a color so vivid it seems unreal. The river’s striking turquoise hue is caused by a natural chemical reaction between two mineral-rich streams, Quebrada Agria and Río Buena Vista, which merge at a point known as "El Teñidero." This one-of-a-kind phenomenon creates the illusion that the water has been dyed blue, even though no pigments are present.

Kaohsiung sits on Taiwan’s southern coast and rises from one of the island’s busiest harbors into a city that rewards slow exploration and lively discovery. History and local belief surface at the Dragon and Tiger Pagodas beside Lotus Pond in Zuoying District. These twin pagodas that are connected to the shore by a zigzag bridge, invite visitors to walk through the dragon’s mouth and out the tiger’s, a practice locals associate with turning bad luck into good fortune.

The capital of Crete, Heraklion is a Greek port city and a popular stop on Mediterranean and Greek cruises. The city is an historical marvel, replete with archaeological wonders and remnants of the region's past. Highlights include the Heraklion Archaeological Museum, the Rocca a Mare Fortress, the Venetian Loggia, and just past the city limits, the Palace of Knossos.

Mâcon is a riverside town in the Saône et Loire department of southern Burgundy, set where the Saône River curves gently through the countryside. Walking through the town naturally leads visitors from the riverfront toward its historic streets, where the past seems to linger in every corner. In the heart of Mâcon’s historic district, pedestrians find streets lined with notable sites.