The only palace not in Royal hands in England, Blenheim Palace was a gift from Queen Anne to John Churchill, the first Duke of Marlborough and ancestor of Winston Churchill -- who was born there. The 18th century house, built between 1705 and 1722, is set in a 2,100 acre park, designed by Capability Brown. Wander around the park and you might just spot the current Duke, who still occupies part of the house.
Highlight: Among the stunning rooms, the Queen Anne Library is a knockout.