Built on a 5-hectare piece of land, Windsor Castle is one of the largest inhabitable castles in the world. Amazingly, the castle is over 1000 years old providing residence to the royal family for all that long. Surviving various wars, the castle features some of the finest English designs. Further, due to reconstruction by different rulers, it has a Georgian and gothic designs. Touring inside you will have a lifetime experience enjoying a variety of collected arts. Moreover, St George chapel that stuns your eyes with the beauty and the world largest queen doll house. Above all, you will have a chance to get into the Shakespeare library and admires his work concerning the castle.
6. Kilkenny Castle, Ireland