Curiosity on Mars photographed this strange tower February 13, 2013.

Strange Tower On Mars! - from UFO Digest - Someone is building sand castles?-tourmars-cercle-red-jpg
Strange Tower On Mars! - from UFO Digest - Someone is building sand castles?-attachment-jpg

Top photo information: Above I indicated in red and surrounded the strange shaped stone hollow tower.

Above I enlarged the strange TOR.

The photo that interests us was taken by the robot on the ground on Mars "Curiosity" February 13, 2013, and posted on the official website by 14 February 2013. The coordinates of the photo are: MASTCAM RIGHT SOL 186.

Source:
http://www.ufodigest.com/article/strange-tower-mars

http://curiosityrover.com/?page=2&limit=100&tzone=local

THE PHOTO IS HERE:

http://mars.jpl.nasa.gov/msl-raw-ima...000E1_DXXX.jpg