Located in the north of Wales, Conwy Castle was built all the way back in 1283 by Edward I of England, who was attempting to conquer his unruly neighbors. Set at a strategic spot on the banks of the River Conwy, the imposing castle played a crucial role in many battles and wars for centuries to come. Featuring not only two hulking barbicans but eight large and impenetrable towers, the castle is widely considered to be one of the finest examples of military architecture in Europe.

While its massive silvery-grey stone walls and riverside location certainly make for a beautiful sight, its interior is no less impressive due to its well preserved medieval royal apartments.