So many fantastic shots in this collection of pictures from the Our World Underwater 2010 competition.

I love these gorgeous pictures from the ghost town of Kolmanskop, in the Namib desert. My buddy Diede and I tried to go there during our travels last Spring, but it was too far out of our way. Good reason to go back!

(Also, if you're considering a trip to Namibia, or Africa in general, I've got some excellent recommendations for you.)

Octopuses are amazing. This video is strange and mesmerizing, but for a real treat, check out the end of this TED talk on underwater astonishments.