This is a composite image of the south pole of Mars. Kinda...

This is a composite image of the south pole of Mars. Kinda looks like candy. Probably doesn’t taste like candy.

Where you see white is a vast region of permanently frozen water ice, many kilometers thick, covered in winter by a few-meter-deep veneer of frozen carbon dioxide, commonly called dry ice. In the Martian summer, the temperature at the pole gets high enough to turn the dry ice into a gas, but the water ice stays frozen. Not all the dry ice disappears, but even in winter the underlying water ice cap is far thicker than the dry ice above it.

(via The Southern Pole of Mars is more beautiful than we ever imagined)