The European Space Agency has released amazing new images of Mars North Korolev crater.
Images are composites, created from five separate images taken by ESA's Mars Express orbits, which have fled the Earth's nearby planet since 2003.
The crater is 82 kilometers wide, filled with an ice cube that is 1.8 kilometers deep at its thickest point.
Unlike other icy craters on the red planet, Korolev keeps the ice year round thanks to a layer of cold air that gets stuck inside the crater and cools its contents.
Korolev crater is named after Sergei Korolev, Soviet Russia's leading rocket engineer during the space race between the Soviet Union and the United States in the 1950s and 1960s. He worked with the Sputnik program that sent the first artificial satellite to orbit, as did the Vostok program where cosmonaut Yuri Gagarin became the first man in space in 1961.