We're actually slightly dubious about this one as there's no information at all on how the numbers were calculated and no indication of what "outdoor" is supposed to mean.
Also, for language, it should have been Catalan and Spanish, as Barcelona is very definitely a city in which you'll hear two languages spoken!
Here's the full infographic if you want to see which world cities could possibly have relegated us to third place!
Elsewhere, from sources possibly slightly more reliable, according to the Catalan News Agency (CNA), Barcelona is "among the world's top 15 cities regarding foreign investment, global competitiveness and scientific production" [full details]. Meanwhile, Mastercard says that Barcelona is "the tenth most visited city in the world".
Oh, and the British Government claim that Spain is "the number one country in the world for Britons committing 'benefit fraud abroad'". Now, that's nice to know!