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If I am remembering correctly, they do allow tours inside the castle or at least a portion of it. We didn't go in but that is a possibility

Ah okay, so might be some areas are still safe. I am afraid that might be some debris will fall anytime.

No it's very well preserved. No chance of any debris falling. Everything was rebuilt and well kept

Ah okay it was renovated. That's good. Maybe someday you can visit inside.