1. Bamburgh Castle was built in 6th century in Northumberland. It was built on a high cliff. It is surrounded on three sides by the sea. Many films were made here.
2. Carlisle Castle was built at the end of the 11th century by William Rufus. It is near Scotland. At first, it was a wooden castle. In 1122, Henry I built walls of stone.
3. Dover Castle was originally a fort, built by the Celts. Then the Romans built a lighthouse, which you can still visit. Later, Bishop Odo of Bayeus built the great Dover Castle.
4. Edinburgh Castle was built in Edinburgh, Scotland. In the 7th century, King Edwin built a fortress on a big rock. Later, it became a great castle.