You have to zoom in
I see farms, roads, possible cities, a cave entrance to hollow Pluto. And that white smooth field is likely the sign of some clever geological terraforming. These ancient people must be intelligent little critters figuring out how to make Pluto sustain life this long after losing it's oceans (and assumable heat), atmosphere and enjoyable climate.
Kudos to Plutonians. I hope we can communicate soon.