The Edinburgh Castle is a historic structure, with the royal castle dating back to the time of the kind David I from the 12th century. The Castle is built on a volcanic high, called the Castle Rock. The Castle was very important in the medieval ages, when there were conflicts to ensure Scottish independence from England. Now, the Castle is one of the most popular tourist attractions in Scotland, with a large number of tourists visiting this place. As a part of the tourist attractions, there are cannons on the top, mounted as they would be in times when the defence of the castle was required, and tourists are always excited to see these.