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.

Riyadh blends stories from centuries with modern splendor. At its core stands Al Masmak Fortress, built of clay and mud-brick in the 19th century. It was the site that set the stage for the unification of Saudi Arabia. Today, it’s a museum that preserves weapons, historical displays, and accounts of that pivotal moment. Adjacent to the fortress, the Souq Al-Zal offers spices, traditional jewelry, and handmade crafts, connecting visitors to the city’s past through its alleyways.

Bay City is a waterfront city in eastern Michigan, situated along the Saginaw River near its outlet into Saginaw Bay, one of the large bays of Lake Huron. Its location on the river helped establish the city as a center for lumber, shipbuilding, manufacturing, and commercial shipping.

Albuquerque, New Mexico, is a city where centuries-old adobe architecture, desert landscapes, and modern innovation meet beneath some of the clearest skies in the country. Every October, Albuquerque becomes the site of one of the most photographed events in the world: the Albuquerque International Balloon Fiesta. For nine crisp mornings, hundreds of hot air balloons rise over the city, painting the sky in brilliant colors and wild shapes with everything from farm animals to space aliens.

Brasília may be a World Heritage Site, but it is only of interest to town planning and architecture students, and those keen to witness the folly of man on a metropolitan scale. It must have looked good on paper, and still looks good in photos, but in the flesh, forget it. Designed by architect Oscar Niemeyer, urban planner Lucio Costa, and landscape architect Burle Marx, the city was built in an incredible three years between 1957 and 1960.