II Peter 3 speaks of "new heavens and a new earth, wherein dwelleth righteousness."
II Peter 3:13 "Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness."
The new heavens and a new earth is the Third Heaven and Earth spoken of by the apostle Paul. For a detailed study: archive.org/details/studiesinabundan00wier/page/86
II Corinthians 12:2,4 "I knew a man in Christ above fourteen years ago... such an one caught up to the third heaven. How that he was caught up into paradise, and heard unspeakable words, which it is not lawful [permitted] for a man to utter."
God showed Paul a vision of the third heaven and the third earth, wherein dwelleth righteousness, but He did not permit Paul to speak of or to write about its details. The third heaven and the third earth are also the "new heaven and the new earth" spoken of in Revelation 21.
Revelation 21:1 "And I saw a new heaven and a new earth: for the
first [former] heaven and the first [former] earth were passed away..."
A day is coming when there will be a new heaven and a new earth, wherein dwelleth righteousness. It is still in the distant future as there will first be a time of wrath and last judgment that Christ has delivered us from.
I Thessalonians 1:10 "And to wait for his Son from heaven, whom he raised from the dead, even Jesus, which delivered us from the wrath to come."