Eilean Donan Castle, Scotland

Edinburgh Castle, Scotland

Urquhart Castle, Scotland

Duart Castle, Scotland

Stirling Castle, Scotland

Dunvegan Castle, Scotland

Culzean Castle, Scotland

Newcastle Castle Keep, England

Neuschwanstein Castle, Germany (more pictures)

Hohensalzburg Fortress, Austria (more pictures)

Bratislava Castle, Slovakia

Akershus Fortress, Norway