Best beach destinations in Europe

I am looking to surprise my wife with a trip to Europe in either September or October. Considering Athens but I am worried the beaches won’t be as amazing as expected but the culture and history will be off the charts

Also considering Malta or the Canary Islands.

I’m trying to find a balance between a relaxing vacation and actually feeling like we are in Europe

Probably want to spend 10 days but may split it into two locations (5 days at each) depending on flight costs between places

Anyone with experience doing similar things, please give me your suggestions

Thanks!

Author: NiceFunction1777