Mars trucks by Bryan Versteeg

Picture of the Day 3/1/15 - Mars exploration vehicles by Bryan Versteeg. More of his space concept art here.

Entering Mars atmosphere by Manchu

Picture of the Day 15/6/14 - Mars habitat module entering Mars atmosphere with Low Density Supersonic Decelerator (LDSD) by French sci-fi artist Manchu (Philippe Bouchet).

Setting up a Mars base by Pat Rawlings

Picture of the Day 8/5/14 - Setting up a Mars base (1998) by space illustrator Pat Rawlings.

(Open link in new tab to view ⇩ in full resolution)

Red Dragon landing on Mars by SpaceX

Picture of the Day 4/5/14 - Red Dragon (made by SpaceX) landing on Mars.

Astronauts exploring Mars by Sean Brady

Picture of the Day 27/4/14 - "Olympos station" (2007) by Sean Brady from United Kingdom.
Author's description of the scene: Setting up an automated weather station on the lower slopes of Olympus Mons.

Spaceship in Mars orbit by deckard01

Picture of the Day 23/4/14 - Spaceship in Mars orbit (2013) by computer graphics artist deckard01.

Astronauts exploring Mars by Ren Wicks

Picture of the Day 15/4/14 - A classic work "Mars mission" (1990) by American artist Ren Wicks. More of his Mars art here.

(Open link in new tab to view ⇩ in full resolution)

Mars rover by Walter Myers

Picture of the Day 13/4/14 - Mars exploration rover by sci-fi artist Walter Myers. Watch more of his art here.

Astronaut working on Mars by unknown artist

Picture of the Day 10/4/14 - Can anyone point me out the author of this Mars artwork? Leave in comments...

Astronauts exploring Valles Marineris by Sean Brady

Picture of the Day 7/4/14 - Exploration of Valles Marineris (2009) by Sean Brady from United Kingdom.

Astronauts exploring Valles Marineris by Tiago da Silva

Picture of the Day 4/4/14 - "Valles Marineris" by Portuguese fantasy artist Tiago da Silva (Grafik). More of his work (no more Mars though) at grafik.deviantart.com

(Open link in new tab to view ⇩ in HD wallpaper resolution)

Astronauts exploring Noctis Labyrinthus by Pat Rawlings

Picture of the Day 2/4/14 - A classic work "in Noctis Labyrinthus" (1989) for NASA by Pat Rawlings.

Maybe it's You there climbing? ;)

(Open link in new tab to view ⇩ in full resolution)