A cappuccino kick-start in the morning before a day spent exploring a new city; a rest in the afternoon with a latte and a slab of cake; a teeny tiny super-strong espresso after a gourmet dinner - coffee is the perfect travel companion. We're looking for the best places around the world to stop for a cup of java. Share your suggestions by submitting a tip or emailing been.there@guardian.co.uk (and don't forget to check our companion tea and cake guide)