Mons Rümker
 Mons Rümker is an isolated volcanic formation that is located in the northwest part of the Moon's near side at selenographic coordinates 40.8° N 58.1° W. The feature forms a large elevated mound in the northern part of the Oceanus Procellarum. The mound has a diameter of 70 kilometres and climbs to a maximum elevation of about 1100 metres above the surrounding plain. It was named after Karl L. C.