I found this article quite interesting and am sharing it here for you to muse over. I take no credit for the content of this article.
After several days shooting at the Hotel Belvedere, Game of Thrones location filming for season four has moved to the Walls of Dubrovnik. The flag of Westeros’ royal family is flying high over the forts of St. Lawrence and Bokar now, and a variety of goldcloaks, Lannister guards, and other extras were spotted on set. Luckily, DuList captured the first day of St. Lawrence and Bokar filming on camera.
Fans passing by were able to snap pics of the cast and crew as they set to work, including some shots of our new Mountain preparing for a fight.
Ours is the Fury: That sword is unbelievably huge. I can’t wait to to see the Mountain in action!
via WinterIsComing.net http://winteriscoming.net/2013/09/day-52-filming-at-the-fort-of-st-lawrence/