In the books by George R. R. Martin, on which the TV shows are based, Casterly Rock is also heavily mentioned, so it is a surprise that not more is known about this location via visual means.

However, emphasising the breadth of the stronghold, he shared: "Casterly Rock is larger. Two leagues long from west to east… that’s approximately six miles, compared to three for Gibraltar.

Specifics about the series and its cast of characters were never revealed, but rumors suggested that the pilot episode revolved around the marriage of a Stark to a member of House Casterly, the ...