Just make use of the PSCS2 filter>Distort>Lens Correction to straighten the structure. And boost the color a bit to have a postcard-looking feel. Hope you like it...
I did a bit of cropping to eliminate her index finger.
PP..
-Color adjustments and levels
-USM (Unsharp mask)
-Applied green filter @ 70% with 25 opacity
-Remove some minors flaws with healing brush.
PSCS2
-Cropped a bit just to eliminate the distracting sign on the left and to emphasize more on the monastery.
-USM
-adjust contrast
-adjust curves
-increased saturation
-add a bit of blue sky
-applied red filter@25% to set the mood.
-framed