One of the great things that my wife and I get to do is travel around the world. On our most recent trip, we spent a few nights in Krakow, Poland at the Sheraton on the riverfront and got to have this be our skyline. One of the interesting stories about the castle is that it had its own dragon for a long time - you could even go down into the dragon's cave or buy a dragon souvenir. It likely came from the Vistula River getting into the caves and starting a reaction that let off steam. Nevertheless, it was a fun story!