Mountains, just like Beasts in the Bible are symbolic of Governments, Kings, Nations. So, it's all of the wicked, corrupt, lying, cheating rulers and their cohorts, (GOVERNMENTS) and people who pledge their allegiance to these Mountains, Beast, that will be melted (DESTROYED) by Jehovah's Kingdom led by his only begotten son, the Messiah, Anointed King of his Kingdom Jesus Christ and his heavenly organization not by any man made rulers.

Serious Bible students need to do research to discern which is literal and which is symbolic. The problem today is that mankind has turned their backs on Jehovah and his word the Bible. Mankind has become the Blind leading the Blind. If a Blind Man leads another Blind Man, they will both fall into a pit.

The literal Earth Abideth forever. After it is cleansed of all wickedness, the literal Earth is described as being a New Earth.

Here is a quote from a Bible scholar I never heard of before. He says, "In Bible figurative language, "heavens" refers to governments and rulers, and "earth" refers to the nation or people."

There are many others that understand the Bible and elaborate on such symbolism in the entire Bible not just the Greek Scriptures as this quote states above. It's all easy to find today if you desire to. Most people today do not have time, nor care about Jehovah and his inspired word, the Bible.

This is why the bible says at Matthew 7:13-14, "Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. 14 But small is the gate and narrow the road that leads to life, and only a few find it.