How about the Cotswolds; it's not all full of tourists - Stanton, Stanway, Winchcombe all have some lovely quiet walks (if that's what you are looking for) with some nice hostelries in the area.
http://www.digital-brilliance.com/hyperg/see/index.htm
Or maybe the Forest of Dean for something quite different.
http://www.visitforestofdean.co.uk/about.htm
Plenty of history and beautiful scenery in both places - enjoy your break wherever it is!
Tink