I don't usually keep two versions of a photo in my portfolio however in this case I think the portrait and landscape orientations of these Moeraki Boulders differ enough to present both. You can find the other one "Moody Moeraki" also on 500px. Each has been very successful for me, this one winning the Naturescapes landscape photograph of the year back in 2008.
I thought I would also give a plug to a new publication which came out this week called "Southern Exposure". It's a collection of images which appeared on flickr and sponsored by Getty, New Zealand Geographic and Fujifilm. You can thumb through the pages online.