This VIS image shows a small part of the huge northern dune field called Olympia Undae. This dune field surrounds 1/3 of the north polar cap. Collected in northern summer, there is no frost remaining on the dunes in this image.
Orbit Number: 72158 Latitude: 79.7238 Longitude: 166.275 Instrument: VIS Captured: 2018-03-21 16:33
https://photojournal.jpl.nasa.gov/catalog/PIA22502