In this perfect VIS image, taken by the NASA - Mars Odyssey Orbiter on April, 10th, 2015, and during its 59.099th orbit around the Red Planet, we can see a large portion of a dark gray-colored, Unnamed Impact Crater located in the Martian Region known as Noachis Terra. This Impact Crater, as you can see really well here, shows some sort of a (Collapse?) Pit right in the center of its relatively (actually, largely) flat Floor.
As a matter of fact, in this Martian Region, most of the Impact Craters that have been so far photographed and studied, have shown several different (and, sometime, truly peculiar) Features, including Central (Simple and Complex) Peaks, as well as Central (once again: Simple and Complex) Pits, which were both - and often - associated with smooth Floors - just like it happens in today's case.
Latitude (centered): 27,2598° South
Longitude (centered): 347,8260° East
This image (which is an Original Mars Odyssey Orbiter b/w and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 19476) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a normal human eye would actually perceive if someone were onboard the NASA - Mars Odyssey Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.