Quetz Waterfall

From publisher blurb: The artificer insisted we visit a specific point along the Quetz River - a waterfall rumoured to have once hosted the richest port on this side of the continent. The stone carving was interesting, but not very promising. Then we found the cave entrance, and everything changed. The remains of an entire civilisation, hidden for thousands of years! The only thing is, we keep seeing movement in the shadows and the fish are acting very strangely... This is a system-agnostic dungeon designed to slot easily into whatever kind of campaign you might be running. Use it as a random settlement encounter, a local place of worship, or the location of knowledge your party seeks.