Querétaro, located in the heart of central Mexico, is a city where centuries of history are still visible in daily life. Its historic center, a UNESCO World Heritage Site, features narrow streets, elegant plazas, and baroque churches that reflect its colonial past. One of the city’s most iconic landmarks is the massive aqueduct, built in the 18th century with 74 stone arches stretching nearly a mile across the landscape.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.

Hayman Island is nestled in the spectacular Whitsunday Islands off Australia's north Queensland Coast.

Arrecife, the vibrant capital of Lanzarote, Spain, offers a unique blend of modern allure and traditional charm. Situated on the eastern coast of Lanzarote, this picturesque city is celebrated for its beautiful beaches, including Playa del Reducto, which boasts golden sands and clear waters perfect for a relaxing day under the sun.

Natchez is a river city in southwestern Mississippi overlooking the Mississippi River bluffs near the Louisiana border. It is recognized for its large collection of preserved antebellum homes, brick streets, and long connection to river trade.