Sitting in acres of Northamptonshire countryside, Althorp has been the residence of the Spencer family for 500 years and is one of England's grand stately homes. It is packed full of treasures, including some fascinating portraits. The original Tudor house is still there, beneath the later restorations and refurbishments, but the overall feel of the place is distinctly 18th century. The gardens are lovely and regular events are held, including an annual literary festival. Althorp is, sadly, best known for the association with possibly the most famous Spencer, Lady Diana, whose last resting place is on an island in the Round Oval lake.
Althorp has limited opening - it is essential to check their website before making a special trip.