Is Casterly Rock from Game of Thrones realistic?

Is Casterly Rock, The Lannister Castle from Game of Thrones, historically accurate? Well we'll get to find out in this detailed historical analysis.

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Music:
Folk Round by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
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Lord of the Land by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
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