The image shows the downward face of the Namib Dune on Mars across a 360-degree panorama, and the site is part of the dark-sand Bagnold Dunes along the northwestern flank of Mount Sharp, according to Nasa. The dune in the image rises about 16-feet at an inclination of 28-degrees.
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The 'video', first posted on NASA's Curiosity Mars Rover Facebook page on Sunday is actually a 360-panorama photo that was taken by stitching together multiple photos from the rover, and allows you to look around the scene - on your phone, you can physically move around to look about you, and on the desktop, you can click to drag and change the view.
Use your smart phone to explore Mars with me in 360 degrees. #FromWhereIStandPosted by NASA's Curiosity Mars Rover on Saturday, January 30, 2016
This image appears to be a panorama that's been wrapped into a sphere, which is why the view in the 'video' is somewhat distorted. Forward - or depth, in other words - has become up, so the Namib Dune appears distorted in the video. However, you can see a better representation on NASA's Jet Propulsion Laboratory's site, where you can get a better idea of the scale of the Martian landscape.