Me and 14yo dd.
We thought we might go to Harrogate for a day and Betty's. My brother pulled a face when I told him and reckoned Harrogate wasn't worth visiting....but he's a man so maybe wouldn't get the idea of bumbling about looking in shops and having nice coffee! 
We wanted to go and do the Ingleton waterfalls walk as well.
And I know it's a bit of a drive but Lightwater Valley is somewhere we've always meant to go.
Anywhere else? Hebden bridge? Skipton castle? Fountains Abbey?