castle (in place names)
「城」 has another reading with different meanings.
castle
城を守るために戦った武士たち。
Samurai who fought to protect the castle.
この城は世界遺産に登録されたよ。
This castle was registered as a World Heritage.
城の周りに堀があるのが特徴だ。
A feature is the moat around the castle.