Described as a cyclopean edifice, Penrhyn Castle shows what unlimited amounts of money can buy; it is a 19th century construction, the major creation of architect Thomas Hopper in Norman Revival style for the Pennant family who made their fortune from the nearby slate quarries. The vast castle has a wealth of furnishings, paintings, and examples of fine slate craftsmanship. The grounds contain a doll museum, a locomotive museum, a natural history room and splendid gardens.