Hár is a crater on Jupiter's moon Callisto. Its name is one of the many names of Odin, the supreme god in Norse mythology. This is an example of a central dome impact crater. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Callisto they are named after characters from myths and folktales of cultures of the Far North.
Image Source. Marker locations are approximate and may not always appear to align with image on map.