Serenely picturesque (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
idyllic
(Other definitions for idyllic that I've seen before include "Delightful in all respects" , "Blissfully peaceful" , "Blissful, peaceful" , "Delightful in every respect" , "Peaceful and deligthful" .)