Anglesey Abbey & Gardens

http://www.nationaltrust.org.uk/main/w-angleseyabbeyandgardenandlodemill 

Battle of Britain Memorial Flight

http://www.raf.mod.uk/bbmf/

Belton House

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

Belvoir Castle

www.belvoircastle.com

Duxford Aircraft Museum

http://duxford.iwm.org.uk/

Deene Park

www.deenepark.com/

Elton Hall and Gardens

http://www.eltonhall.com/

Grimsthorpe Castle Park and Gardens

http://www.grimsthorpe.co.uk/

Nene Valley Railway

http://www.nvr.org.uk/

Rockingham Castle 

http://www.rockinghamcastle.com/

Sandingham House and Gardens

http://www.sandringhamestate.co.uk/

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

Please check opening times of the attractions you wish to visit.