Then death and Hades were thrown into the lake of fire. The lake of fire is the second death. Anyone whose name was not found written in the book of life was thrown into the lake of fire. Revelation 20:14
AW Tozer writes in his book The Attributes of God, "People worry about whether there is fire in hell or not. I have no reason not to believe it; what the Bible says I take as the truth. I would not hesitate to refer to the fires of hell, for the Scripture talks about the “lake of fire.” But if there were no fire in hell, if hell were a habitable country, it still would be the ugliest country in the universe, the most shockingly deformed place that is known in the creation because there is none of the perfection of beauty. Only God is absolutely perfect."
I think what Tozer is really focused on isn't the detail but the macro, which is that Hell is the absence of God and without God, nothing beautiful or pleasing can exist. As a result, Hell will be everything ugly, vile and wicked. An eternity without the attributes of God, really would be Hell and a choice poorly made.
Join me in reading Revelation 20 and be encouraged!