2 Peter 3:10-12

As for that day of the Lord, it will advance like a thief: then the heavens will rush with violence, the boiling elements will be dissolved, and the earth with all its contents, shall be burnt away.

Revelation 20:11

Then I saw a great white throne, and him that sat on it, from whose presence the earth and the heaven fled away, so that they disappear'd.

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
As for that day of the Lord, it will advance like a thief: then the heavens will rush with violence, the boiling elements will be dissolved, and the earth with all its contents, shall be burnt away.
Revelation 20:11
Then I saw a great white throne, and him that sat on it, from whose presence the earth and the heaven fled away, so that they disappear'd.