Nigel already mentioned Broadway.
But I will say, have a walk around lovely Broadway, eat lunch at the Broadway Deli on the High Street. Go through the shop to the back terrace, be seated at a table and order delicious sandwiches.
After you've had enough of Broadway, hop in the car and travel south to Winchcombe, about 8 miles south.
See Sudeley Castle there, which is a fortified manor house.
It has a long history, dating back to the Tudors and long before that.
One of Henry the 8th's wives is buried here; Queen Katherine Parr, the last and surviving wife.
See its history, here:
Book tickets at the website I have given above.
After you finish at Sudeley, have a look around Winchcombe.
There are several good pubs there where you could have dinner before heading back to Chipping Campden.