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

Do all castles in Europe have drawbridges and water defenses on their fortifications? - Quora

How can a fortified position be captured (military)? - Quora

Could a modern military successfully invade and capture one of the castles or strongholds that were built during medieval times? - Quora

When did castles become obsolete as a defensive structure? - Quora

The World's 30 Most Impressive Fortresses

What were the most unique castles during medieval times? - Quora

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

Have any castles been built in modern times? - Quora

What are some Romanian historical landmarks? - Quora

What are some examples of military forts? - Quora

What are/have been the most impregnable fortresses in history? - Quora

Why would civilizations with advanced technology still use castles? - Quora