There’s something that looks like a couple of stream channels, except they’re above the surrounding terrain, not below it. The explanation is that after drying up, the stream beds were more resistant to erosion than the stuff around it.
I’m near the north end of this HiRISE image, and will be going almost straight down the middle of it the next couple days.
99.3%, projected arrival at Curiosity June 14.
MarsWalk kmz file (for Google Earth — View >> Explore >> Mars)