What are some of the best fortified historical fortresses in your opinion? - Quora

What are some of the most imposing castles around the world? - Quora

Are there any ruined castles in England that are still accessible to the public? - Quora

What are some of the best fortified historical fortresses in your opinion? - Quora

What happened to all the abandoned castles from medieval times? Why were so many castles built that were never used or conquered? - Quora

How common was it for the castle to be inhabited by no more than 4 people really? - Quora

Why did the middle ages castles have so many towers? - Quora

What's your favourite castle in Britain? - Quora

What are some of the best fortified historical fortresses in your opinion? - Quora

What is the greatest castle in the world? - Quora

What type of defensive structures (walls, enclosures, forts, etc) did Native Americans build? - Quora

In what years were castles first considered obsolete in France and Germany? - Quora

Who built the castles in Europe? - Quora

What are some of the greatest fortresses ever built (they have been successful in repelling invaders and/or are impressive in terms of their size and ingenuity)? - Quora

How many forts did the Romans build in England? - Quora

How to tell if a castle is real or fictional - Quora