Dodge and Burn...mainly dodge in this case. Also, if you are using Photomatix (not exactly sure the setting for other HDR programs), but using the saturation highlights/shadows slider may improve the photo even more.
It's also my opinion that black and white would do this picture a lot of justice. Here is a version I adjusted for so. I used the Image->Adjustments->Black&White function to convert the photo, cropped it slightly to put the shack in a more appealing location, adjusted the curves, and then used a soft light layer to bring out the shack. Even without the Black and White conversion, the image looked stronger with some dogding and burning, and some curve adjustments.