There is only one officially named plain on the Moon: Planitia Descensus, the Plain of Descent, named to commemorate the site of the first soft landing on the moon by the Soviet Luna 9 probe on 3rd February 1966. Click on its name to view the Moon centred there.
Name Lat. Long. Diam. (km) Planitia Descensus 7.1N 64.4W 1.0