This shot took a bit of post production work to get it to where I was happy.
The original Raw was converted to a 16bit Tiff file, this was then imported into CS5 so that I could run the channel swap action, this opens the channel mixer dialogue box and selects the red output channel. The value for red is set to 0 whilst the value for blue is set to 100. it then selects the blue output channel and sets the blue value to 0 and the red value to 100. This gives us the blue sky and yellow foliage effect.
I then opened up the Hue/Saturation panel and increased the saturation to increase the yellows. I then opened up the Vibrance option and increased this also.
I flattened the resulting tiff file and imported it into Nik Software Colour Efex Pro so that I could apply the Tonal Contrast filter to the shadows and mid tones, this really crisps up the foliage and the stone work, but also puts too much emphasis on the sky, so using a control point I selected the sky and reduced the Tonal Contrast down to zero, this helped reduce the amount of noise in the sky, but there was still too much for my liking, so after saving the Tonal Contrast changes i opened the file up in Nik Software Define noise reduction tool, and managed to remove the noise in the sky to an acceptable level.