Hussey Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). Dark dots are dunes.
Hussey Crater is an impact crater in the Phaethontis quadrangle on Mars at 53.8° S and 126.7° W. It is 99.0 km in diameter. Its name refers to American astronomer William Hussey. Dunes are visible in the northern part of the crater floor.
Pictures below show the dunes from a wide view and then eventually show greatly enlarged view with HiRISE.
Original source: https://en.wikipedia.org/wiki/ Hussey (crater). Read more