In 1831, Charles Darwin sailed to South America aboard the H.M.S. Beagle. On the return voyage across the Pacific, the vessel stopped on a small group of islands far off the Ecuadorian coast, changing the course of human scientific endeavour and self-understanding forever. Fascinated by the unique wildlife on the islands, Darwin collected biological specimens and studied them over the next 30 years. His findings led to the formulation of the scientific theory of evolution by natural selection. This small group of islands and their one-of-a-kind wildlife are to thank for one of humanity's most remarkable discoveries. And today, almost 200 years later, they remain a source of endless fascination and a favourite travel destination for scientists, nature and wildlife enthusiasts, scuba divers, and anyone interested in the wonders of the natural world.

If Saigon is the frenetic, commercial heartbeat of Vietnam, then verdant and historic Hanoi is the sedate, intellectual soul of the country. Its leafy boulevards, serene lakes, and sweeping white French colonial architecture set the scene as tourists and locals go about their business at a pleasingly civilised pace.

Long known for its old-world charm, from the historic Faneuil Hall to the Freedom Trail that celebrates Boston’s preeminent role in the American Revolution, Boston has come a long way towards staking its claim in the 21st century. With the completion of the “Big Dig” that buried Boston’s vast network of highways underground, Boston has hit the new century running. Attractions span beautiful public libraries, fascinating museums and plenty of sports. Boston is destined to grow ever more beautiful as more and more of the ungainly elevated highways are replaced with lush parks.

Known as one of the imperial cities of Morocco, the opulent city of Fès is the country's oldest city, and it is split into two areas – Fès-el-Bali (Old Fes) and Fès-el-Djedid (New Fes) – as some mystical fusion of an ancient Islamic past and the French-influenced present. The endless Medina, which contains 9,500 streets, sells everything from jewellery to furniture, crafts, carpets, leather goods and spices.

For centuries, Jeddah, where the desert meets the sea, has been a crossroads for traders, travellers and pilgrims in the Red Sea. As Saudi Arabia’s second-largest city, it thrives with eclectic dining, bustling shopping districts, and a uniquely liberal social scene. Yet, its true significance lies in its role as the gateway for millions en route to the holy cities of Mecca and Medina. Rich in history and brimming with character, Jeddah offers a dynamic blend of tradition and modernity.