Hell exists. Hell is there.
1. Hades and Gehenna are symbolic references to the lake of fire. When the unbeliever dies, he is immediately in torments in the lake of fire.
Luke 16:22-23 So it was that the beggar died, and was carried by the angels to Abrahams bosom. The rich man also died and was buried. And being in torments in Hades, he lifted up his eyes and saw Abraham afar off, and Lazarus in his bosom.
Matthew 10:28 And do not fear those who kill the body but cannot kill the soul. But rather fear Him who is able to destroy both soul and body in hell [Gehenna].
2. Abyss and Tartarus are symbolic references to the bottomless pit. The bottomless pit is the prison for demons.
Luke 8:31 And they begged Him that He would not command them to go out into the abyss.
2 Peter 2:4 For if God did not spare the angels who sinned, but cast
them down to hell and delivered
them into chains of darkness, to be reserved for judgment;
3. The lake of fire is a lake of fire. The bottomless pit is the bottom of the lake of fire.
Revelation 9:2-3 And he opened the bottomless pit, and smoke arose out of the pit like the smoke of a great furnace. So the sun and the air were darkened because of the smoke of the pit. Then out of the smoke locusts came upon the earth.
Here's a picture:
This is Spa - Hell!
My father drew this for me.