User blog comment:SayuriDarling/The House of Hades Official Discussion/@comment-7153535-20131011000313

I was wondering if I could get some clarification

Spoilers

when Percy is getting near death from the curses he sees Tartarus in its true form for a brief amount of time. He realizes that that was what Nico was seeing when he was in Tatarus and why he nearly went insane. But why did Nico see Tartarus in its true form? I get that he is the son of Hades but is that the reason. Did Gaea make Nico see it truly?