The Floor of Noctis Labyrinthus (context frame - MULTISPECTRUM; credits: Lunexit)

This image shows part of Noctis Labyrinthus, the “Labyrinth of the Night.” This is a system of connecting troughs which form a maze-like network at the western end of Valles Marineris, the giant canyon system of Mars.

The individual troughs are usually kilometers across; this image shows part of the floor of one of the troughs, with some intriguing fine-scale features.

Near the center of the image, the floor is broken up into many small knobs and hills, probably eroded remnants of a larger geologic unit.