Edited Mars Reconnaissance Orbiter image of sand dunes near the rim of the Hellas Impact Basin, which is one of the largest craters in the solar system.

Edited Mars Reconnaissance Orbiter image of layered rocks and sinuous ridges in the north Hellas Region of Mars.

Edited Mars Reconnaissance Orbiter image of sand dunes named Kolhar. Red channel.

Edited Mars Reconnaissance Orbiter image of "dune convoys in West Olympia Undae. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of ridges in Meridiani Planum on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes on bedrock.

Edited Mars Reconnaissance Orbiter image of a scoured section of the floor of Eos Chasma. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of part of Meridiani Planum. Processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes in the summer.

Edited Mars Reconnaissance Orbiter image of sand dunes named Tleilax. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of mesas on Mars, surrounded by dune-filled valleys.

Edited Mars Reconnaissance Orbiter image of degrading craters (one wonders what they did) in Noachis Terra on Mars.

Edited Mars Reconnaissance Orbiter image of T-shaped sand dunes on Mars.

Edited Mars Reconnaissance Orbiter image of a dune field in West Hellas Planitia on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of the limb of Mars and the thin atmosphere just barely visible over the surface.

Edited Mars Reconnaissance Orbiter image of evidence of periodic bedding of terrain in Tithonium Chasma on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a well-preserved crater with a nice central uplift.

Edited Mars Reconnaissance Orbiter image of a large volcano on Mars with a dark pit on its side.

Edited Mars Reconnaissance Orbiter image of a filled-in channel and an infilled (using NASA's terminology) crater near Quenisset Crater on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of Nilosyrtis Mensae.

Edited Mars Reconnaissance Orbiter PR image of a cliff on Mars with light-toned material on it.

Edited Mars Reconnaissance Orbiter image of layered bedrock.

Edited Mars Reconnaissance Orbiter image of sand dunes and frost on Mars.

Edited Mars Reconnaissance Orbiter image of a fissure being monitored for slope changes. Processing variant.

Edited Mars Reconnaissance Orbiter image of a scoured section of the floor of Eos Chasma. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of Gale Crater with Curiosity visible within the image. Grayscale version. Crop of region where Curiosity is visible.

Edited Mars Reconnaissance Orbiter image of pits on Elysium Mons.

Edited Mars Reconnaissance Orbiter image of a mid-latitude pit in the surface of Mars. (It looks like a mound, but is a depression, not a hill.) Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a sandy region of Herschel Crater on Mars.

Edited Mars Reconnaissance Orbiter image of a sand dune field over layers of bedrock on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a dune sea in Ganges Chasma.

Edited Mars Reconnaissance Orbiter image of gullies exposing layers of different-colored bedrock on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes and north polar terrain on Mars.

Edited Mars Reconnaissance Orbiter image of fine-branched ridges on Mars.

Edited Mars Reconnaissance Orbiter image of shadows over a fossil glacier (I wonder if NASA means "fossil" as the glacier has turned into rock?). Color variant.

Edited Mars Reconnaissance Orbiter image of sand on the floor of Pasteur Crater.

Edited Mars Reconnaissance Orbiter image of cinder cones without roots (which I suppose means they aren't very tall).

Edited Mars Reconnaissance Orbiter image of north Syrtis Major on Mars. Processing variant.

Edited Mars Reconnaissance Orbiter image of pits on Elysium Mons. Processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes near the rim of the Hellas Impact Basin, which is one of the largest craters in the solar system. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a volcanic vent on a volcano on Mars.

Edited Mars Reconnaissance Orbiter image of a new (relatively speaking) crater on Mars inside Pasteur Crater. The blue indicates basaltic material. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a depression and sand dunes on Mars.

Edited Mars Reconnaissance Orbiter image of sand dunes and frost on Mars.

Edited Mars Reconnaissance Orbiter image of a recent impact crater on Mars.

Edited Mars Reconnaissance Orbiter image of a fissure being monitored for slope changes.

Edited Mars Reconnaissance Orbiter image of a depression in Juventae Chasma on Mars. Color/processing variant.

Edited MRO image of a light-toned deposit in Aureum Chaos.

Edited Mars Reconnaissance Orbiter image of the south Melas region showing a rocky wall with sand pressing up against it.

Edited Mars Reconnaissance Orbiter image of a mound of ice in Louth Crater on Mars.