Wow.... Where to start!
If you prefer a more rural retreat then I would suggest Glen Coe is a must. It's magnificent. Lots of opportunities for photos, walks and wildlife encounters.
Depending on how able you are, Steall Falls, Glen Nevis (Near Fort William) is rather special too. But it isn't easy to access.
The Cairngorms are stunning too as are the Fife and Aberdeenshire coastline.
Dunottar Castle in Aberdeenshire is very special
and the cute wee villages of the East Neuk of Fife are well worth a look too
In all fairness it's all beautiful and all well worth visiting.
If you give me an idea of whereabouts you would prefer to visit (West coast, islands, highlands, Borders etc) then I could offer more ideas.