What is 'hell' in Christianity?

The Holy Bible (Christian) views it as a giant lake of fire that will never be quenched, the fire is everlasting and those who are thrown in will never come out. The demons of Hell guard the lake and push back in the people who try to escape their punishment. The Sea of Doom also known as Hell. Is where the souls who didn't repent from sin and did not repent from blasphemy of the Holy Spirit will surely make their home in that fiery realm of woe and pain.