Belton House (National Trust) Grantham - Lincolnshire.

Belton House is a restoration country house with stunning interiors, fine silver and furniture collections.
Built in 1685-88 Belton offers a great day out whether you are looking for peace and tranquility or lots to do.
There are also formal gardens, a landscaped park and a large adventure playground.
(www.nationaltrust.org.uk)