Ibn Battuta is a small lunar crater on the Mare Fecunditatis, a lunar mare in the eastern part 's near side. It lies to the southwest of the crater Lindbergh, and northeast of the prominent Goclenius. The mare to the south and west contains a number of ghost crater formations, consisting of crater rims that have been submerged by lava flows and now form ring-shaped projections in the surface. These are best observed under conditions of oblique lighting, when the terminator still lies on or near the Mare Fecunditatis. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.