Melanthius is the third largest impact crater on Tethys, one of Saturn's moons. Melanthius is noted for its prominent cluster of central peaks, which were formed in the original impact. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Tethys they are named after people and places from Homer's Odyssey.
Image Source. Marker locations are approximate and may not always appear to align with image on map.