I'm not really a fan of HDR, mainly because there are so many poor examples and because I think it is used too much and has almost become cliched. There are some nice ones here though, that don't look too unnatural. This was the last shot I did with HDR, which was actually a combination of grads and HDR.
Fire and Water by
Kernuak, on Flickr
Sorry, I missed this and thanks. I used a Singh-Ray reverse grad on the sky, then used Photomatix to recover the highlights in the rockpools. It's a while since I did it, but I think I bracketed three shots and tonemapped them (although it's possible it was a single shot to produce 3-4 TIFFs from the RAW), reducing the amount of HDR as much as possible, so that it just recovered the detail, to prevent it looking unnatural. Of course, in reality, the rockpools would be darker than the sky, but I wanted it close enough to be able to view it as potentially natural.
And an earlier one that immediately made me imagine pteradactyls flying about. It was a sort of landmark image for me too, as it was one of the first images where I felt I'd mastered the lighting and used it for effect on the rocks and water.
Jurassic Evening by
Kernuak, on Flickr