It is not HDR. This was a single exposure. I fiddled with settings in Lightroom, starting with the BW - infrared preset. Made the tree too white, so I fiddled some more. Last step was a Photoshop plugin for noise removal.
It was shot in RAW, and then fiddled with in lightroom starting with the B&W-Infrared filter preset with a final noise removal step in photoshop using Imagenomic's noiseware plug-in. The color image wasn't much to look at, but I was very pleased with the B&W version.
Oh wow, this is absolutely gorgeous. Dramatic, picturesque and the details jump out at you as if they were alive. Actually, that tree looks almost like it's pulling its roots up out of the earth in a bid for freedom XD