What are the most beautiful places on Earth, as seen from space?

Commander Chris Hadfield has been tweeting photos from the International Space Station for months now, and many of his images are utterly gorgeous. Like this one, of a Bolivian lake whose shoreline looks like what Hadfield called "dinosaur teeth." What do you think are the most photogenic features of Earth from space?

Post your favorite pictures of Earth from space. For inspiration, here is Hadfield's Twitter feed, and here is a gallery on NASA of satellite photos taken from Earth orbit.