Sliding rock of Racetrack Playa
uploaded by <a href="//commons.wikimedia.org/wiki/User:Tetraktys" title="User:Tetraktys">User:Tetraktys</a>
2003-08-23
<a rel="nofollow" class="external text" href="http://pdphoto.org/PictureDetail.php?mat=pdef&amp;pg=5182">pdphoto.org</a>