These days, many of China's largest urban areas are easily recognizable to people from all over the world, with the skylines of coastal mega-cities such as Shanghai and Beijing taking their place in the global consciousness. Far less known though is the inland city of Chongqing - another of China's five top-tier "National Central Cities" - where in 2010 the Chinese government embarked on a plan to urbanize a further 10 million of the region's rural population, with around 1,300 people now moving into the city every day.
Since his first visit to the city in 2009 photographer Tim Franco has been on a mission to document the rapid change in what he believes is "maybe the most widely unknown megacity in the world." The result is Metamorpolis, a forthcoming photographic book by Franco with text by British journalist Richard Macauley, which documents the colossal scale of development juxtaposed against the people of Chongqing - many of whom still live an incongruous rural lifestyle among the concrete sprawl. Read on after the break for more images from the book and an interview with Franco about the experience of documenting one of the world's fastest-growing cities.