We were in the same situation. We had our usual two weeks somewhere sunny last year (usually Portugal or Greece) and while The Comptroller General enjoyed sitting by the pool from dawn to dusk, me and the kids were climbing the walls after three days.
So this year we’re going to Morzine (!!!) for 10 days (!!!)
It took two months of “discussion” and I still can’t believe she agreed to it, but once I showed her all the things she and our daughter can do while me and the ManChild go downhilling, she was sold. Heaps to do there now – horse riding, great walks (you can chair lift and up amble down) reasonable shopping and restaurants, that weird goat village place for a day trip, donkey trekking, big swimming pool and water slides, etc etc etc).