The Chthonian Womb is a short D&D adventure for four 7th-level player characters (PCs). The adventure is designed to be edition-agnostic; for edition-specific rules, consult Appendix 1.

The PCs discover a cave that disgorges not only a small stream of water, but also strange and hostile beasts. Deep within the cave, a veritable jungle of bizarre lifeforms, alien horrors, and long-buried secrets await.