Inyeug, more commonly known as Mystery Island, is a tiny, uninhabited islet off the coast of Aneityum in Vanuatu’s southernmost province. Measuring just 1.5 kilometers long, the island is completely free of roads, shops, and electricity. What it offers instead is pure seclusion and untouched beauty. Cruise ships often anchor offshore, bringing day visitors to its white-sand beaches and shallow coral lagoons, but once they depart, the island returns to stillness.

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.

Pacific coast Mexican state highlighted by the popular city of Acapulco, with its vibrant nightlife and beaches.

Roatan is the largest of the eight islands known collectively as Las Islas de la Bahia. Brilliant clear blue waters and palm fringed beaches are cooled by gentle trade winds. An extensive reef system offers the most spectacular diving and snorkeling in the Western hemisphere, while inland nature reserves give an up-close look at native wildlife, including monkeys, sloths, and parrots.

Islamorada, located in the Florida Keys, is a chain of islands often referred to as the “Village of Islands.” Known for its turquoise waters, coral reefs, and vibrant fishing culture, it is a premier destination for anglers, snorkelers, and divers.