It's got to be somewhere close to the Gloucestershire, Herefordshire, Worcestershire border. Gosh! I've just realised its here where I live.
Within a forty mile radius. We have the small but lovely Tudor towns of Ross on Wye, Ledbury, Monmouth, Unton on Severn. Newent and a bit further away the Cathedrals of Gloucester, Hereford & Worcester, in addition there are the Abbeys/Priories of Malvern, Pershore, Tintern & Tewkesbury.
Castles, Manors, Courts abound and there are professional theatres at Cheltenham, Malvern, Worcester & Tewkesbury. For classical music it has a life equalled only by London. There is also of course the Cheltenham racing and musical festivals and the Upon Jazz festival.
We have the Forest of Dean, Leadon Valley, Symons Yat, fantastic restaurants, and the gorgeous undulating fertile countryside of the Welsh Border is fed by he three beautiful rivers and tributaries of the Avon. Severn and Wye.
I must say however that if I were to move anywere else in England it would be Exmoor. In Wales the Brecon area or in Scotland, the north central area. If the USA, unless we could buy the farm next to KF, it would have to be Montana or Wyoming.