Infra Red?

[alwyncooper]

Infra Red Photoshop Castle by alwyncooper, on Flickr

 

[Mike Lamb]

I would try leaving the castle clear b&w and infaredding everything else.

 

[alwyncooper]

I would try leaving the castle clear b&w and infaredding everything else.

LOL, strangely enough that is exactly what you see!
The central building is pretty much a straight repro of the green channel - the rest is pushed for the IR look

 

[Yemme]

I love it. It reminds me of the book The Snow Queen very mystical image. Great job.