After conquering the Giant of Saint Michael’s Mount, Brittany, Arthur reminisced about the one he conquered “in the mount of Araby”, who was not quite so big and fierce.
Since there seems no record, at least in Malory, of Arthur having been out of Britain before, the “Mount of Araby” may have been in Britain – perhaps Saint Michael’s Mount in Cornwall.
See also
Giant | The Legend of King Arthur
Mount Aravius | The Legend of King Arthur