Rio Dulce is a river region in eastern Guatemala that connects Lake Izabal to the Caribbean Sea. The area is centered around the town of Fronteras and the long waterway that cuts through tropical forest, limestone cliffs, and wetland habitats.

Originating as a tiny fishing village in 1038, modern Kehl has become an important link between Germany and France. Rhine River cruises most often use Kehl as their gateway to the much larger and better-known Strasbourg. The savvy traveler, though, might choose to skip the jaunt across the river and enjoy many similar sights, shopping and cuisine as those offered in the teeming French city.

Ulaanbaatar, the capital of Mongolia, is a city where tradition and modern life intertwine. Nestled in a valley surrounded by mountains, it serves as the country’s cultural, political, and economic hub. The city’s skyline features a mix of Soviet-era architecture, Buddhist monasteries, and contemporary high-rises.

Lanzarote, the northernmost of the Canary Islands, is a striking destination characterized by its volcanic landscapes and unique architectural heritage. Known for its otherworldly scenery, the island boasts a remarkable volcanic terrain shaped by eruptions in the 18th and 19th centuries. The Timanfaya National Park is a highlight, where visitors can witness geothermal demonstrations and explore the dramatic lava fields on a guided tour.

Tortuguero, located on Costa Rica’s remote northern Caribbean coast, is a destination unlike any other in the country. Accessible only by boat or small aircraft, this coastal village sits between the Caribbean Sea and a network of freshwater canals. Its name, meaning "place of turtles," comes from the thousands of sea turtles that arrive annually to lay their eggs on its beaches, including green, leatherback, and hawksbill turtles.