Tourism and relaxation at the UK?

[shdtt]

I am planning to go to the UK during summer for relaxation. I want to know what are nice places - other than London- I can go to. Like 2 years ago we went to Cheltenham and it was great , we enjoyed the greenery and local life style very much , we would want to do a simillar thing this year , certainly at a reasonable cost. Anything advices / recommendations ???

Thanks !