Nestled among the stunning scenery of the Scottish Highlands sits ... there has in fact been a castle on the island since at ...

Dumbarton Castle was built on top of volcanic rock beside the sea. In the 1200s it protected Scotland from Vikings. During World War 2 it became a lookout tower and was fitted with anti-aircraft guns.

Built in the 1400s, the castle was not only a residence for the Crichton family – one of Scotland's most powerful families – but was also a prison and a fortress. It was in service for nearly ...