Its legacy as the former imperial capital of Vietnam is just one of many reasons to visit Hue. For more than a century, the emperors of the Nguyen dynasty (1802-1945) ruled from the Forbidden Purple City, the innermost enclosure of the citadel. Today, this complex is designated as a UNESCO World Heritage site and draws millions of visitors each year.

Mostar, a picturesque city in Bosnia and Herzegovina, offers a captivating blend of history, culture, and natural beauty. Renowned for its iconic Stari Most (Old Bridge), this 16th-century Ottoman structure arches gracefully over the Neretva River, symbolizing the city’s historical role as a bridge between East and West.

What sets Kaikōura apart are the extraordinary marine encounters that begin just off the shoreline. The Kaikōura Canyon, an underwater gorge that plunges to great depths close to land, creates currents rich with nutrients that attract a remarkable array of sea life year-round. Sperm whales are a common sight here and are frequently spotted on local boat tours. Dusky dolphins twist and leap in large pods, and colonies of New Zealand fur seals laze on rocky outcrops along the coast.

Located on the southern coast of Finland at the delta of the Kymi river, the city of Kotka is a major Finnish sea port. Perhaps the best-known attraction of this multicultural and creative city is the country's largest urban maritime festival, an annual celebration that includes boating events, dance and music performances, and Finland's largest parade which marks the beginning of the city-wide event.

Santiago, the cultural capital of Cuba, is a passionate, unique destination, second in size and importance only to Havana, the governmental capital of the island. Some of Cuba's most famous musicians were born here, as well as the Bacardi brand of spirits, and the UNESCO World Heritage describes the local citadel of San Pedro de la Roca as "the most complete, best-preserved example of Spanish-American military architecture."