The NASA - Mars Pathfinder Lander obtained this view of the Surface of Ares Vallis (which is a portion of a larger Panorama known as the "Presidential Panorama") during the 18th Sol of its Mission to Mars (we wish to remind you that the arrival on Mars of the NASA - Mars Pathfinder Lander occurred on July 4, of the AD 1997).

Visible in this scene is a large variety of Rocks and Boulders, including the funny-looking Boulder nicknamed "Yogi", that is being photographed by the Mini-Rover Sojourner. The two Hills (dubbed “Twin Peaks”) visible on the left side of the Horizon are approx. 1 Km away and they can also well be seen in pictures taken from orbit. The NASA - Mars Pathfinder Lander (whose colorful "Nest" is here partially visible) landed at the "Mouth" of Ares Vallis, a large Outflow Channel about 1500 Km long that emptied, from the Martian Highlands, into the Chryse Basin.

Vast Floodwaters, similar to those which carved Ma'adim Vallis, poured over this site several million years ago and the rounded Rocks visible in the foreground may have been transported here and then eroded during these (likely catastrophic) Event. We cannot be one-hunderd-percent sure about it, but is very plausible that both the Twin Peaks were entirely (or, at least, their lower portion) overwhelmed and, in time, eroded, by the aformentioned Floodwaters.

The Twin Peaks, on the other hand, are two really modest-size Hills located to the South/West of the NASA - Mars Pathfinder Lander. They were discovered on the first panoramas taken by the IMP camera of the Lander, on the 4th of July, 1997, and were also subsequently identified in a few Viking Orbiter images taken over 20 years earlier. The two Peaks are approximately 30-35 meters (such as about 100 feet) tall; the Northern Twin lies approximately 860 meters (2800 feet) from the Mars Pathfinder Lander, while the Southern Twin is about one kilometer away (3300 feet). This scene includes Bouldery Ridges and "Swales" (or "Hummocks") of Flood Debris that range from a few tens of meters away from the Mars Pathfinder Lander, up to the distance of the Southern Twin Peak.