National Geographic International Photography Contest 2009
You have three days left to submit your photos. There are three categories - People, Places and Nature - and each photographer can submit up to six images in total.
The prize? There are two in fact. A camera - not any camera, of course, but a Leica one. The winning image will also be published in the magazine.
Unfortunately, you'll need to pay $22 dollars per each single submission, I guess they're doing it to eliminate the really bad and random pictures, but still, that's quite a lot to pay for the privilege.