IT HAPPENED that, after Enoch had spoken to his children, the angels carried him on their wings to the first heaven, and placed him in the clouds. And then I looked, and I looked again higher up and I saw the ether, and they placed me in the first heaven and showed me a great sea greater than the sea on earth. 2° Enoch 3📜

And THOSE men took me and led me to the second heaven, and showed me darkness, darker than that of the earth, and I saw prisoners bound, guarded, awaiting the great and infinite judgment, and these angels were dark, darker than the darkness of the earth, and made them cry incessantly, all the time. 2nd Enoch 7:1📜

And THOSE men then took me, and led me to the third heaven, and there they laid me: and I looked down, and saw the produce of that place, which was never known. And I saw the sweetest flowering trees and I looked at their fruits and the food they produced, and they all gave off the sweetest fragrances. 2nd Enoch 8:2📜

In || Corinthians 12-13 Paul is also taken to the 3rd heaven where it is a place of peace.

The second heaven is our space/universe outside the earth, where the planets are wandering stars awaiting the day of the Creator's judgment. Jude 1:13📜

THEN I was taken to a place where nothing was complete. There I saw something amazing; There was neither an exalted heaven nor an established earth, but a desolate and horrible place. There I also saw seven stars of heaven tied together, like great mountains, and like boiling fire. I exclaimed: For what manner of crime were they bound, and why were they removed from their place? Then Uriel, one of the holy angels who was with me, and who led me, answered: Enoch, why do you ask; why do you reason with yourself, and anxiously inquire? These are those stars that transgressed the commandment of the most high God; and they are tied here, until the infinite number of days of their crimes are completed.

1st Enoch 21:1-6📜

What exists beyond the Firmament? God. With the invention of the heliocentric system and "expanding outer space", no one knows where God is anymore. But now we know.

Nimrod didn't try to build a physical tower if God's place wasn't something physical too. They weren't stupid.

"Thick clouds cover him, and he cannot see us as he walks the vault of heaven." Job 22:14📜

"The earth is the Lord's, and everything in it, the world and those who live in it; for it is he who founded it on the seas and established it on the waters. Who can ascend the mountain of the Lord? Who can enter in his Holy Place? He who has clean hands and a pure heart, who does not turn to idols or swear by false gods. He will receive blessings from the Lord, and God, his Savior, will grant him justice. Such are those who seek him, who seek your face, O God of Jacob. Open, O gates; open, O ancient gates, that the King of glory may come in. Who is the King of glory? The Lord mighty and mighty, the Lord mighty in wars. Open, O portals; open, O ancient gates, that the King of glory may enter. Who is this King of glory? The Lord of hosts; he is the King of glory!" Psalms 24:1-10

"From his throne in heaven the Lord laughs and makes fun of them." Psalms 2:4📜