There is a Hell and it is for the unbelievers, but it isn’t an eternal torment. Revelation talks about the Great White Throne Judgement in chapter 20 and there you find the dead are taken from Hell judged according to their works and them and Hell are cast into the Lake of Fire and destroyed. The Second Death is the death or destruction of the soul.
Here is a good read on this:
http://www.jeremyandchristine.com/articles/eternal.php
The lake of fire is where unbelievers will be, and yes, it is eternal.
“And if your hand or your foot causes you to stumble, cut it off and throw it from you; it is better for you to enter life crippled or lame, than having two hands or two feet, to be cast into the eternal fire,” (Matt. 18:8).
“And these will go away into eternal punishment, but the righteous into eternal life” (Matt. 25:46).
•”And these will pay the penalty of eternal destruction, away from the presence of the Lord and from the glory of His power,” (2 Thess. 1:9).
“And the devil who deceived them was thrown into the lake of fire and brimstone, where the beast and the false prophet are also; and they will be tormented day and night forever and ever,” (Rev. 20:10).