^^ I think you are talking about tombs there.
and To get to the Underwolrd you have to be ascended then ou head to the temple of ages in northwest Kryta. Then when your country/area has favor do any emote at the statue of Grenth and his voice will apear. Pay it 1k and then you get to go to the underworld. But there is no point in going to the underwold unless you are either in a trapper team or you are doing 55hp monk with SS necro.
