Saint Augustine, Florida, is a charming tapestry of history and coastal beauty. As the oldest continuously inhabited European-established settlement in the continental United States, this historic city offers a fascinating glimpse into early American life. Founded by Spanish explorers in 1565, Saint Augustine boasts an array of colonial architecture and historic landmarks.

Lake Tana, located in the northwest of Ethiopia, is the country’s largest freshwater lake and the source of the Blue Nile. Its calm waters are dotted with more than 30 islands, many of which are home to ancient monasteries adorned with religious paintings and manuscripts.

Asmara, the capital of Eritrea, is a city where time seems to have paused in the mid-20th century. Known for its remarkably preserved Italian modernist architecture, the city has earned recognition as a UNESCO World Heritage Site.

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.

Cape Town, located at the southern tip of South Africa, is one of the world’s most striking coastal cities. Towering over it is Table Mountain, a flat-topped landmark that can be reached by cable car or on foot, offering sweeping views of the city, ocean, and beyond.