D&C 109:74 speaks of the heavens being unveiled and valleys being exalted, resulting in glory filling the earth.
Doctrine and Covenants 109:74, The Church of Jesus Christ of Latter Day Saints, accessed May 23, 2023
74 And be adorned as a bride for that day when thou shalt unveil the heavens, and cause the mountains to flow down at thy presence, and the valleys to be exalted, the rough places made smooth; that thy glory may fill the earth;