On sol 25 Opportunity examined the soil at Challenger Memorial Station in a trench it dug with its wheel. Here is a stereo view from the forward navigation cameras, comlete with fisheye distortion.
Views in the frames below will pan in the direction shown by the arrows beneath them when you place the mouse over the arrows. Use the leftmost pair for cross-eyed, rightmost for parallel-eyed.
Click on a thumbnail on the right to view the pair or the red-cyan anaglyph of the scene.