[Lee Stewart]

Korolev crater on Mars boasts an ice rink measuring over 50 miles wide—and it’s one of the most spectacular surface features on the Red Planet, as the latest image from the Mars Express spacecraft reveals.

Named after Russian rocket scientist Sergey Korolev, this incredible crater is located in the northern lowlands of Mars and just south of Olympia Undae—a large patch of dune-filled terrain that encircles the planet’s northern polar cap. It may look as if Korolev crater is filled with snow, but it’s actually ice. The impressive impact crater measures 51 miles across (82 kilometers), and at the center of the circle—it’s deepest point—the ice extends down for 1.1 miles (1.8 kilometers).