The ceilings are unusually low in this vault, never rising more than 40 feet from the ground. It often resembles a maze, with pillars, stalactites, stalagmites, fissures, and rock walls making passage difficult. In other parts there are wide-open spaces, the comparatively close ceiling having no obvious means of support.
At the centre of the vault is a huge pillar of stone 1,000 feet in diameter. There is a massive adamantine-banded door in the western side of the pillar, large enough for two elephants to enter side-by-side. The urdefhan believe that their race was born behind this door, created in a grand daemonic experiment. As a result, Minos-Pashat is one of their most sacred places.
The urdefhan do not live in their sacred vault. Instead, priests and elders come here on pilgrimages and pray before the sacred door. Some are said to receive visions; others mysteriously disappear, leaving behind their belongings in a pile to the side of the door.