Enjoyable days out include

Sandingham House and Gardens

http://www.sandringhamestate.co.uk

Wimpole Hall

http://www.wimpole.org

Deene Park

http://www.deenepark.com/

Duxford Aircraft Museum

http://duxford.iwm.org.uk/ 

Belvoir Castle

http://www.belvoircastle.com

Belton House

http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-beltonhouse/   

Althorp House & Grounds - Open July & August

http://www.althorp.com

Anglesey Abbey & Gardens

http://www.nationaltrust.org.uk/angleseyabbeyandgardenandlodemill.htm

Cambridge, Lincoln, Leicester, Northants are all no more than 1 hr away. Leaflets of all these and more are in the information centre on the CL.