The winner is this image of Lake Bondhus in Norway; I'd embed a copy, but it's only available under a non-free the Free Art License (with which I'm not sufficiently familiar to be comfortable using the image under its terms, although the fact that the GNU Project recommends it for free artistic works inspires confidence) and a decidedly non-free Creative Commons License1. But hey, it's just extra click if you want to see the image.
The second and third winners are a great self-potrait of T.C. Dyson at the International Space Station, and a photograph of the Cueva de los Verdes on Lanzarote. Congratulations to all the winners, as well as all others!
- I'm really not sure what to make of this. The Free Art License is presumably at least as free as e.g. the cc-by-sa license; if it weren't, it'd not be sufficiently free to be acceptable on the Wikimedia Commons, thus rendering the whole image non-free. So why not use a free Creative Commons license that has the same properties in practice as the Free Art License? It'd make it much easier for people, and I don't see a good reason for the non-free Creative Commons license.