Are any of the castles real in Game of Thrones?

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Tags

1. #takes
2. #filmed
3. #scenes
4. #across
5. #mountainsides
6. #fantasy
7. #forests
8. #thrones
9. #iceland
10. #place
11. #craggy
12. #world
13. #medieval
14. #europe
15. #dozens
16. #castles