Echoes in the Depths
An immense cavern the players fell into after the discovery of the Drow invasion tunnel. They landed on the top of a giant rock pillar in a sea of darkness and were able to make out the tops of other pillars and bridges that seemed to be woven from the shadows themselves. Decrepit gargoyles stood watch at the bridges, long since weakened with age. Each pillar top was large, the smallest was 100ft across and the largest they encountered had the ruins of city sprawled across it. Also of note was the encounter with a black dragon and the pit.