Olympus Mons is, at 24 kilometres, the highest volcano in the Solar System. At its base, the volcano is about 600 kilometres across. This image is a birds-eye view taken by the HRSC in false colour.
Copyright note:
As a joint undertaking by DLR, ESA and FU Berlin, the Mars Express HRSC images are published under a Creative Commons licence since December 2014: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO. This licence will also apply to all HRSC images released to date.