Mare Serenitatis
Banting is a "simple" impact crater. It is located in the Sea of Serenity, which is also known as Mare Serenitatis, a large patch of lunar mare. Maria like Mare Serenitatis are dark, smooth areas created by lava pooling on the surface and then cooling, covering up any previously existing craters. They were originally called "maria" ("seas") because astronomers believed they were bodies of water.