This image from NASAs Mars Odyssey shows the delta deposit on the floor of Eberswalde Crater.

This image from NASAs Mars Odyssey shows apart of the rim of an unnamed crater in Terra Sirenum.

This image from NASAs Mars Odyssey shows an unnamed crater in Noachis Terra. This crater has a pit in the center of the floor of the crater.

This image from NASAs Mars Odyssey shows a cross section of Pavonis Mons, including part of the summit caldera.

This image from NASAs Mars Odyssey shows one of the mega-gullies that empties into Echus Chasma. Echus Chasma is approximately 4km deep in this reg...

This image from NASAs Mars Odyssey shows a small section of Maadim Valles. Maadim Valles is an outflow channel that arises in the southern lowlands...

This image from NASAs Mars Odyssey shows sand dunes within Proctor Crater. These dunes are composed of basaltic sand that has collected in the bott...

This image from NASAs Mars Odyssey shows a small section of Uzboi Vallis. This valley system arises just north of Argyre Planitia and flows northwa...

This image from NASAs Mars Odyssey shows an unusual layer of smooth material covering the flanks of the volcano Peneus Patera, located south of the...

This image from NASAs Mars Odyssey shows part of the floor of Kaiser Crater. Kaiser Crater is 207 km (129 miles) in diameter and is located in Noac...

This image from NASAs Mars Odyssey shows Mangala Fossae, a long linear depression called a graben, formed by extension of the crust and faulting.

This image from NASAs Mars Odyssey shows a small section of Osuga Valles.

This image from NASAs Mars Odyssey shows complex dune forms located on the floor of Russell Crater.

This image from NASAs Mars Odyssey shows the delta deposit located on the floor of Eberswalde Crater.

This image from NASAs Mars Odyssey shows part of the southwestern cliffside of Melas Chasma.

This image from NASAs Mars Odyssey shows a small portion of the immense lava flows that originated from Arsia Mons.

This image from NASAs Mars Odyssey shows the part of the northern side of Tithonium Chasma.

This image from NASAs Mars Odyssey shows the main part of Coprates Chasma (north) and Coprates Catena (south).

This image from NASAs Mars Odyssey shows a channel near Ladon Valles.

This image from NASAs Mars Odyssey shows part of the northern cliff face of Ophir Chasma.

This image from NASAs Mars Odyssey shows a region of chaos terrain south of Eos Chasma.

This image from NASAs Mars Odyssey shows part of Louros Valles on the southern part of Ius Chasma.

This image from NASAs Mars Odyssey shows Nirgal Vallis and several of its tributary channels.

This image from NASAs Mars Odyssey shows a small portion of the immense lava flows that originated from Arsia Mons.

This image from NASAs Mars Odyssey shows the very eastern margin of Ophir Chasma. Ophir Chasma is approximately 317km long (197 miles) and is part ...

This image from NASAs Mars Odyssey shows several channels. These unnamed channels are flowing downhill into the northern part of Bosporos Planum.

This image from NASAs Mars Odyssey shows a small section of Nirgal Valles just where it flows into the larger Uzboi Vallis.

This image from NASAs Mars Odyssey shows part of Claritas Fossae. The linear features (fossae) are graben, a tectonic feature created when blocks o...

This image from NASAs Mars Odyssey shows a small channel located west of Holden Crater in Noachis Terra.

This image from NASAs Mars Odyssey shows a small portion of the immense lava flows that originated from Arsia Mons.

This image from NASAs Mars Odyssey shows a part of an unnamed crater in Terra Cimmeria. The finger-like projection from the southern rim towards th...

This image from NASAs Mars Odyssey shows a portion of Sirenum Fossae. The linear features are tectonic graben.

This image from NASAs Mars Odyssey shows the upper elevations of Olympus Mons, including part of the summit caldera.

This image from NASAs Mars Odyssey shows sand dunes within Proctor Crater. These dunes are composed of basaltic sand that has collected in the bott...

This image from NASAs Mars Odyssey shows a complex crater located in Terra Cimmeria, just north of Hesperia Planum.

This image from NASAs Mars Odyssey shows a section of Labou Vallis. Labou Vallis is located south of Eumenides Dorsum and is 258 kilometers (160 mi...

This image from NASAs Mars Odyssey shows two depression crossing called Pavonis Fossae that are located on the northern lower flank of Pavonis Mons.

This image from NASAs Mars Odyssey shows part of the floor of Kaiser Crater. Kaiser Crater is 207 km (129 miles) in diameter and is located in Noac...

This image from NASAs Mars Odyssey shows part of the floor of Rabe Crater. Located in Noachis Terra, Rabe Crater is 108 km (67 miles) across.

This image from NASAs Mars Odyssey shows sand dunes within Proctor Crater. These dunes are composed of basaltic sand that has collected in the bott...

This image from NASAs Mars Odyssey shows part of Nili Patera. Nili Patera is the northern caldera in the immense volcanic complex of Syrtis Major P...

This image from NASAs Mars Odyssey shows Kaiser Crater and many individual dunes.

This image from NASAs Mars Odyssey shows part of Athabasca Valles. Multiple streamlined islands are seen in this image.

This image from NASAs Mars Odyssey shows a section of Cerberus Fossae.

This image from NASAs Mars Odyssey shows a small portion of the immense lava flows that originated from Arsia Mons.

This image from NASAs Mars Odyssey shows a section of Mamers Valles.

This image from NASAs Mars Odyssey shows several unnamed channels located in northern Arabia Terra.

This image from NASAs Mars Odyssey shows a section of Mamers Valles. The channel is nearly 1000 km long (600 miles).

This image from NASAs Mars Odyssey shows part of Nanedi Valles. Located In Xanthe Terra, the channel system is 508 km (315 miles) long.

This image from NASAs Mars Odyssey shows Ius and Tithonium Chasmata, located at the western end of Valles Marineris.