Dumbarton is a town on the River Clyde, a few miles west of Glasgow. On the north shore of the river you will find the imposing Dumbarton Castle. Founded in the 5th century, Dumbarton was once the capital of the ancient kingdom of Strathclyde. The key to the town’s original success was a gigantic volcanic rock on which a series of castles has been built. This dramatic volcanic plug, Dumbarton Rock, filled the crater of a volcano that was active 350 million years ago. You can see the castle and the rock for miles around and it makes for great photograph opportunities. Also close to Dumbarton is the splendid Overtoun Estate, with its landscaped parkland and exotic plant life. One of the town’s busiest attractions is the fascinating Denny Tank Museum.