Check out all the locations in this video: Built by kings and queens to protect and rule their realms, castles not only had to withstand attack, but also had to be able to project their power and wealth. As such, sturdy fortresses and imposing walls were erected alongside wonderful palaces that were full of ornate and ornate chambers and throne rooms. These castles were often built in strategic and spectacular settings at the mouths of valleys, at the entrance to mountain passes, or on glittering lake shores. Add the weight of history and these amazing structures set in breathtaking scenery make up some of the most beautiful castles in Europe.