Vibrant, ever-changing, multi-faceted Johannesburg flings contrast at you from every angle. Trees line streets where houses hide their manicured gardens and pristine blue swimming pools behind high white walls, miles of shacks tell of the effects of the apartheid years — still to be overcome. The air of Africa’s most dynamic city vibrates with music and buzzes with business while its stylish restaurants, elegant shops, art galleries, and theatres delight the international visitor.

New Delhi is a thoroughly inscrutable onion of a city: every layer you peel off reveals an even deeper layer of history. Rebuilt eight times by its many conquerors, it has been the seat of the Hindu, Muslim, and British empires. All of them have left their mark on the architecture, customs, food and people of this relentless city; all are undergoing a transformation in the capital of modern India.

Edinburgh effortlessly balances its weighty history with contemporary energy. The Royal Mile’s weathered cobbles lead past medieval closes and modern whisky bars, while the shopfronts of Princes Street mirror the jagged skyline of the Old Town. By day, you can hike up Arthur’s Seat for panoramas that stretch to the Firth of Forth; by evening, join the animated crowds at the Edinburgh Festival Fringe or browse the shelves of independent bookshops. Scotland's compact, hilly capital is a city where every alley holds a story waiting to be uncovered.

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.