Description: OK for this one you have to Start in the colorized terrain on Mars that shows land elevation. This will take you to a spot where you can clearly see that there is something very large there. The colorization indicates that the "something" reaches a height of 21km. Now...with the "something" centered in your page, click on the Visible image to go back to the normal satellite view and watch in amazement as this object simply vanishes. All of the surrounding terrain still matches the colorization, but the "something" is no longer there to be seen, and it should be huge and easily visible.