Berlin is known for its mod sensibilities and uber-cool attitude. Sometimes that sense of style translates into the dining spaces, like in these excellent hotel breakfast areas. Take a look for yourself and see why Berlin is one of the coolest cities in Europe. The Hotel Art Nouveau Berlin is a charming, family-run B&B in the Charlottenburg neighborhood. An organic breakfast buffet is served in the sunny breakfast room, which also boasts exciting art, just like the name implies.