Actually, I play this game a lot in the Curiosity Raw Image Gallery, trying to place various images in a larger context. This one was epic. The sol 165 MAHLI gallery contains some artificially lit images, taken at night, of this ( hot linked ) feature:
The scale can be judged only subjectively, and the location “could be anywhere”. I tracked the recent movements of Curiosity and had an idea around where it must have been. Never would have found it though if it hadn’t been for two things: This sol 166 image of the same feature at a slightly smaller scale ( again hot linked ) :

… and this “smoking gun” image from the front hazcam with  virtually the same time stamp ( you guessed it ) :
Note from the closeups the evidence of Curiosity’s wheel-crush maneuver. The following sol 164 Front Hazcam image shows the left front wheel sitting right on the spot:
This is right in front of the “lean-to” formation which identifies the John Klein drilling site. It so happens that a nice 6 image panoramic view of the spot from sol 162 gives good detail, so that the formation can be seen in a wide context: ( click to enlarge! )

Do you see it? I found it still very difficult to spot even though the location is narrowly defined. For one thing, that light vein is hard to see, and … it’s upside down! So here’s a comparison where I rotated and foreshortened the closeup to compare with an excerpt from the panorama, and there’s Waldo!