Interesting Facts #93: Big Cities

Looks like we'll be visiting (as opposed to just changing planes at) at least five of the world's twenty largest cities, according to these official UN figures (thanks Jim!). As well as the 3rd (Mumbai), 8th (Mexico), 9th (Shanghai), 12th (Bangkok) and 13th (Beijing), we'll also take in numbers 31, 42 and 54. The same five also make it into the top twenty largest urban areas, although in a different order. We'll need a barely inhabited Thai island after that ... - Mark