The Mars monolith is a rectangular boulder discovered on the surface of Mars. It is located near the bottom of a cliff, which it likely fell from in the past. The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away.
- Boulders and Layers in Canyon - NASA
- HRSC - ESA (overview of HiRISE image region by Mars Express)
- HiRISE image of area