Have you ever looked into Infrared Photography?
I'll admit that I've been a bit infrared-curious for some time now. For those of us that enjoy really - far - out looking images, infrared photography can be quite amazing to see.
I saw this link hovering around the GooglePlusOSphere the other day and it reinvigorated my interest in the subject.
Pretty amazing stuff if you ask me.
I haven't tried capturing infrared images yet and I'm really not even sure where to start aside from a "infrared filter" they sell on the intertubes. Some of the sites even mention making modifications to your camera's high-pass filter. Well, we won't be doing THAT but a filter should be easy enough to experiment with: I'll keep you posted!