#The Lowdown
According to the dictionary, a castle is officially a large fortified structure built in medieval times that protects those inside against attack with thick walls, battlements, towers, and in many cases a moat. Most of the world's castles are strewn across Europe, but some lucky residents of the United States can visit a real castle in their own backyard! In fact, lots of American castles were built by business tycoons as symbols of wealth, power and love. Check out these 4 marvelous castles -- each with a fascinating story!