Beijing, China
Our last stop in China was in the mammoth capital, Beijing! With around 20 million people living there it was much bigger than all the others we'd visited and on par with São Paulo in Brazil which also had a really big population.
We were 'warned' of the crazy smog that can engulf the city on days where the pollution is particularly heavy but on our arrival we had clear skies and decent air... It wasn't to last! The rest of the time it was quite foggy looking a...