This November I am going to visit Vienna again, and again for Perl event. Last time it was european conference, this time—“local” event which is nor ordinal because it happens in two different cities. First day in Vienna, second in Bratislava. Cities are close to each other and connected by Danube river. Not sure that I could use any kind of water transport at that time, but it's quite nice to see Danube again—thus there will be three cities I visited which stand on it (Belgrade was the first).