118km Letronne Crater imaged from SLDEM dataset found at Map-A-Planet-2. Snapshot in Meshlab of stl relief file, enhanced in Photoshop. There are a few rilles in the foreground I haven’t seen mentioned elsewhere. The advantage of a southern illumination.
They are not that easy to see even from orbit: The WAC camera view
Here is the same view with the histogram stretched:
Another angle with Gassendi A and Gassendi B.
Apollo 16 view of Letronne Crater.