I realize that the bible and the Lord teach us that His salvation is more than being saved from the the lake of fire; however, my initial thought after reading Evangeline's question was that a natural lake is usually of a size that when you look at it you can see the entire body of water, but an ocean is obviously too immense. Then I thought of The Rich Man and Lazarus:
"The rich man also died and was buried, and in Hades, being in torment, he lifted up his eyes and saw Abraham far off and Lazarus at his side" (Luke 16:22-23). Also, "26 And besides all this, between us and you a great chasm has been fixed, in order that those who would pass from here to you may not be able, and none may cross from there to us.’ 27 And he said, ‘Then I beg you, father, to send him to my father’s house”” 28 for I have five brothers””so that he may warn them, lest they also come into this place of torment."
Maybe in heaven there will be an alloted time, or for eternity, to see those suffering in the lake of fire as reminder to us of what Christ has done for us on the cross. "For the wages of sin is death, but the free gift of God is eternal life in Christ."
Some other questions, which I do not want to get away from the original, but: Is hell/the lake of fire in the center of the earth? Will hell be destroyed when the earth is destroyed?
"But by the same word the heavens and earth that now exist are stored up for fire, being kept until the day of judgment and destruction of the ungodly.
But do not overlook this one fact, beloved, that with the Lord one day is as a thousand years, and a thousand years as one day. The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you,a not wishing that any should perish, but that all should reach repentance. But the day of the Lord will come like a thief, and then the heavens will pass away with a roar, and the heavenly bodies will be burned up and dissolved, and the earth and the works that are done on it will be exposed.
Since all these things are thus to be dissolved, what sort of people ought you to be in lives of holiness and godliness, waiting for and hastening the coming of the day of God, because of which the heavens will be set on fire and dissolved, and the heavenly bodies will melt as they burn! But according to his promise we are waiting for new heavens and a new earth in which righteousness dwells" (2 Peter 3: 7-13).
KM