Most of these attractions are within a
30 - 40 mile radius of Letchworth

Knebworth House - One of England's most beloved stately home and gardens and host of major concerts
Hatfield House - Historic House and gardens
Paradise Wildlife Park
Shuttleworth a unique Collection of historic aeroplanes & vehicles and Swiss Garden and Falconry Centre
Whipsnade Wild Animal Park
Benington Lordship - Historic Gardens
The Bedford Butterfly Park
Wimpole  Hall,   Park,  Farm and  Gardens
Woburn Abbey Sculpture Gallery
Woburn Abbey
Woburn Safari Park
Imperial War Museum Duxford - Europe's top aviation museum static displays and airshows
The Fighter Collection operates, rebuilds and maintains Europe's largest collection of airworthy WWII aircraft and is based at Duxford Airfield
The Stained Glass  Museum   -  Ely Cathedral
Nene Valley Railway - Peterborough
And London is only a relatively short trip
by car or train