Watching Games of Thrones you could be forgiven for thinking that the hulking walls and rugged fortresses of King’s Landing must have been conjured up on a computer. The truth is that Dubrovnik , once a mighty city state that held both the Venetians and Ottomans at bay, is that spectacular. I arrive in this ancient city determined to not just stroll around the Game of Thrones trail, but instead hike, kayak and bash around in a speedboat seeking out my own King’s Landing adventures.