Revelation 16:20

20 and every island did flee away, and mountains were not found,

Revelation 16:20 Meaning and Commentary

Revelation 16:20

And every island fled away
This may be understood either of the dissolution of the world, the present heavens and earth, when there will be no more sea, ( Revelation 21:1 ) and so consequently no islands:

and the mountains were not found;
for the earth and the heaven will be fled away at the appearance of Christ the Judge, and there will be no place found for them, ( Revelation 20:11 ) and new heavens, and a new earth, without sea or mountains, will succeed: or rather this may signify the utter extirpation of all the antichristian powers in every shape, whether on islands or on the continent; for this day of the Lord will be upon every high mountain and hill, to bring them low, and the Lord alone shall be exalted, ( Isaiah 2:14 Isaiah 2:15 Isaiah 2:17 ) and may particularly respect the dissolution of monasteries, and the plundering them of their riches and revenues.

Revelation 16:20 In-Context

18 and there came voices, and thunders, and lightnings; and a great earthquake came, such as came not since men came upon the earth, so mighty an earthquake -- so great!
19 And it came -- the great city -- into three parts, and the cities of the nations did fall, and Babylon the great was remembered before God, to give to her the cup of the wine of the wrath of His anger,
20 and every island did flee away, and mountains were not found,
21 and great hail (as of talent weight) doth come down out of the heaven upon men, and men did speak evil of God because of the plague of the hail, because its plague is very great.
Young's Literal Translation is in the public domain.