Drawn to a warm climate, Southern hospitality and economic opportunity, 1.2 million people left the Northeast and Midwest for the Sun Belt states between 2010 and 2013. But how will this mass migration to the South shape America’s urban development, cultural diversity and economic future?

About 40% of Hamburg's 1.8 million residents don’t own a car, so IKEA has introduced its first ‘citystore’ – an urban little sister to its sprawling, out-of-town counterparts. It’s already more popular than any other German branch, but who is this inner-city store attracting?

Tokyo is often perceived as a disjointed concrete jungle. Roppongi Hills challenges this assumption by putting all life’s essentials – from museums to office space – under one roof, wrapped up in almost three hectares of foliage. Is this what the cities of the future will look like?

With wood-panelled walls and cold-press juices, Leap’s buses have been criticised for contributing to San Francisco’s rising inequality. Elitism aside, bus travel may be key to bringing efficiency and equality to our expanding cities, and Leap is just one of many pioneering transport services.