Unlike the movie, Scrooge does not visit Hell at all in the book. He does meet a character that looks much like the modern day Grim Reaper, but he does not go to Hell. He goes to a cemetery, and he sees his tombstone. He knows he is the man who has been described in Stave 4, and he is terrified. At this point, he pleads with the ghost.
“Spirit!” he cried, tight clutching at its robe, “hear me! I am not the man I was. I will not be the man I must have been but for this intercourse. Why show me this if I am past all hope?” (Stave 4, enotes etext p. 50)
Scrooge has been in his own personal Hell as he experiences his death. However, he does not actually visit Hell and the place is never described.