Game of Thrones: George R. R. Martin reveals what Casterly Rock looks like

Throughout eight seasons of Game of Thrones, viewers heard the Lannisters constantly talking about their Castle, Casterly Rock. House Lannister was one of the major players throughout this series, with Cersei (Lena Headey) even fighting Daenyra Targaryen (Emilia Clarke) for the Iron Throne. However, not once did we catch a glimpse of this impressive stronghold