The passages north and south are 50' wide, rough hewn stone, with some rough areas here and there. Drips
from cave formations occasionally splash the ground, and occasional streamlets cut
across the passage.
The passages cuts through a very large sinkhole, a shaft ascending and descending
as far as the eye can see. The sinkhole is 80' around, and edged with crumbing stone
on all sides. If the party can see over 80' they can see the passage continuing on the
other side.
Inconveniently,
the shaft is also a dead magic zone. The edges of the pit allow magic to
work fitfully, so someone with spiderclimb might be able to navigate around the edges,
but they run a risk of having stone crumble away from the walls (1% per 2 lbs).
On the far (southern) side of the shaft, the weave has some differences, noticable by
any wizard casting detect magic, or attempting to cast spells. The main effect is the
suppression of Teleport spells, but there are sure to be other as yet undiscovered properties.
The party wizard has theorized that the alteration to the weave is actually coming from
from one of their foes, the Laughing Skull, but this has not been proven either way.