城跡

1. Origins, structure, and basic meaning

• Structure: 城跡 is read しろあと.
• Basic usage: It refers to the site or ruins remaining where a castle once stood.

2. Common pitfalls and similar expressions

• A castle site as a location
  • 城跡から町を見渡す treats the castle ruins as a vantage point.
• Excavated ruins
  • 発掘された城跡 means castle remains uncovered through excavation.