Washington DC - USA
Washington DC - the US capital has a lot of offer, especially culture. Sophie went to discover Washington with her parents in October 2015 and they enjoyed the various sights [Capitol, Museums, Zoo, etc.]
The numerous Smithsonian Museums offer for everyones taste - art, history, nature, technic and culture. You need more than a couple of days to discover all of them. And not to forget about the other sights like the capitol, white house etc.