Deep Tzartol (pronounced TZAR-toll) is a ghoul city in the Darklands. The settlement is built within a massive cylindrical space in the middle layer of the Darklands, about six thousand feet below the surface. Roughly a quarter of a mile tall and three hundred feet in diameter, this skymetal alloy cylinder long predates the ghouls that now call it home. The general structure and design of Deep Tzartol is generally similar to the ancient, automaton-infested sites that can be found scattered across Khapesh, though it is much larger in scale. The ghouls have repurposed the many smaller chambers that open into the cylinder, with their former contents thrown into a large pile at the bottom of the city. Rickety scaffolding and ladders connect the various levels and chambers of the city, treacherous for those not nimble enough to navigate them.
The ghouls of Deep Tzartol tolerate outsiders, though generally do not frequently venture far outside the city themselves. The duergar of Barazar El have been known to trade with Deep Tzartol, apparently seeking the ancient items the ghouls have cast aside. Cave systems connect the city to Kur in the north as well.