A mysterious region in the distant east of the world. The Empty Lands are important because they apparently lay beyond the eastern boundaries of Middle-earth, and so give a vital clue to the structure of Arda.

According to the work known as the Ambarkanta (reproduced in volume IV of The History of Middle-earth), beyond the eastern shores of Middle-earth, across the Eastern Sea, there was a distant place known simply as the Eastern Land, or the Land of the Sun. This must correspond with the Empty Lands of the Akallabêth, but the only specific detail we have of their geography is a mention of a tall mountain range known as the Walls of the Sun.

The Gates of Morning, through which the Sun rose, also lay in the distant east, and the geography of the Empty Lands seems to imply that the Sun's gate must have stood somewhere in this region. Indeed the name 'Walls of the Sun' suggests that the gates lay among the mountains, so for the Númenóreans to see them from their ships at sea, as we know they did, the gates must have been truly immense.