Second Age
In the Second Age, Eru buried King Ar-Pharazôn of Númenor and his army when they landed at Aman in the Second Age, trying to reach the Undying Lands, which they wrongly supposed would give them immortality. He caused the Earth to take a spherical shape, drowned Númenor, and caused the Undying Lands to be taken "outside the spheres of the earth".