2 Peter 3:10-12

But the day of the Lord will come like a thief; in which the heavens will pass away with a great noise, and the elements being scorched up will be dissolved, and the earth and the works in it will be burnt up.

Revelation 20:11

And I saw a great white throne, and him sitting on it, from whose face the earth and the heaven fled away; and there was found no place for them.

Treasury of Scripture Knowledge

Summary

And the mountains shall be molten under him, and the valleys shall be cleft, as wax before the fire, and as the waters that are poured down a steep place.

Bible References

The mountains

2 Peter 3:10
But the day of the Lord will come like a thief; in which the heavens will pass away with a great noise, and the elements being scorched up will be dissolved, and the earth and the works in it will be burnt up.
Revelation 20:11
And I saw a great white throne, and him sitting on it, from whose face the earth and the heaven fled away; and there was found no place for them.