Leeds Castle, started back in 800s and lived in by many English queens through the years. It was mentioned in the Domesday Book survey of 1086, but eventually fell on hard times until it was restored by Lady Baillie. It is the sort of castle you could imagine actually living in. There is a nice walk through the park, a typical English cottage garden, a maze and grotto to keep the children amused. There are sometimes falconry displays, and if you are feeling adventurous, you could try a Segway tour.