Thanks to the implementation of a coastal highway in the 1980s and the government's subsequent infrastructure investments, Natal is now the largest city in Brazil's Rio Grande do Norte. Visitors are drawn to its beautiful beaches, white sand dunes and a diverse cultural experience. The city also lays claim to having some of the cleanest air on the continent as well as the world's largest cashew tree, the Cajueiro de Pirangi, which produces roughly 70,000 nuts annually.

Red Sea beaches, world-class snorkeling and spectacular desert environments are all reasons to visit the port city of Aqaba, Jordan. Take a quick walk from the city's lovely waterfront promenade and behold its Old Town, which features the 14th century Mamluk Fort and the Aqaba Archaeological Museum.

Krong Battambang is a riverside city in northwestern Cambodia, known for its preserved colonial-era architecture, rice-growing countryside, and long connection to Cambodian arts and education.

Iguassu Falls, straddling the border between Brazil and Argentina, is a breathtaking natural wonder that captivates visitors with its sheer scale and beauty. This UNESCO World Heritage Site boasts the largest waterfall system in the world, with nearly 275 individual falls cascading over a rugged landscape.

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.